Kristin Cavallari shares tribute to late brother one year after his death: 'I know he is watching over me'

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One year after her brother's death, Kristin Cavallari still holds his memory close to her heart.

The former reality star took to Instagram on Monday, where she shared an emotional, touching tribute to her late brother, Michael, who was found dead of hypothermia in the hills of Grand County, Utah, last year, days after being reported missing.

WATCH: Kristin Cavallari Opens Up About Brother's Death and Her Scary Car Accident

"Yesterday was the anniversary of my brothers passing. There hasn't been a day that's gone by where I haven't thought of him and missed him," the 29-year-old mother of three captioned a photo of Michael. "I know he is watching over me and my family though from all of the amazing signs he has given us. Love and miss you so much, Mikey."

The news of Michael's disappearance and subsequent death broke just after the birth of Kristin's third child, daughter Saylor James, with husband Jay Cutler.

See photos of Kristin Cavallari through the years:

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Kristin Cavallari through the years
Kristin Cavallari – designer, author, busy mom of three and avid Young Living Essential Oils fan – partners with Young Living to inspire unique holiday gift ideas for mindful living and tips for entertaining, just in time for the holiday season Tuesday, Dec. 6, 2016, in New York. Check out her favorite Young Living products, including Aria Ultrasonic Diffuser, Lavender Essential Oil and Thieves® Essential Oil, at www.YoungLiving.com. (Jack Dempsey/AP Images for Young Living) 
Kristin Cavallari – designer, author, busy mom of three and avid Young Living Essential Oils fan – partners with Young Living to inspire unique holiday gift ideas for mindful living and tips for entertaining, just in time for the holiday season Tuesday, Dec. 6, 2016, in New York. Check out her favorite Young Living products, including Aria Ultrasonic Diffuser, Lavender Essential Oil and Thieves® Essential Oil, at www.YoungLiving.com. (Jack Dempsey/AP Images for Young Living)
Kristin Cavallari attends The Carousel of Hope Ball, in Beverly Hills, California, on October 8, 2016. / AFP / TOMMASO BODDI (Photo credit should read TOMMASO BODDI/AFP/Getty Images)
NEW YORK, NY - SEPTEMBER 15: Kristin Cavallari poses during Kristin Cavallari Emerald DUV Jewelry + Chinese Laundry Presentatation during September 2016 Style360 at Row NYC on September 15, 2016 in New York City. (Photo by Ilya S. Savenok/Getty Images)
LOS ANGELES, CA - AUGUST 02: Kristin Cavallari is seen on August 02, 2016 in Los Angeles, California. (Photo by BG007/Bauer-Griffin/GC Images)
UNIVERSAL CITY, CA - AUGUST 01: Kristin Cavallari visits 'Extra' at Universal Studios Hollywood on August 1, 2016 in Universal City, California. (Photo by Noel Vasquez/Getty Images)
WESTWOOD, CA - JULY 26: TV personality Kristin Cavallari arrives at the premiere of STX Entertainment's 'Bad Moms' at Mann Village Theatre on July 26, 2016 in Westwood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
LOS ANGELES, CA - JULY 29: Kristin Cavallari is seen on July 29, 2016 in Los Angeles, California. (Photo by BG002/Bauer-Griffin/GC Images)
WESTWOOD, CA - JULY 26: TV personality Kristin Cavallari arrives at the premiere of STX Entertainment's 'Bad Moms' at Mann Village Theatre on July 26, 2016 in Westwood, California. (Photo by Gregg DeGuire/WireImage)
LOS ANGELES, CA - MARCH 23: Kristin Cavallari speaks at SiriusXM Studios on March 23, 2016 in Los Angeles, California. (Photo by Mark Davis/Getty Images)
LOS ANGELES, CA - MARCH 21: Actress Kristin Cavallari signs copies of her new book 'Balancing In Heels: My Journey To Health, Happiness And Making It All Work' at Barnes & Noble at The Grove on March 21, 2016 in Los Angeles, California. (Photo by Paul Archuleta/FilmMagic)
LAGUNA BEACH, CA - MARCH 20: Kristin Cavallari signs copies of her new book 'Balancing in Heels!' at Laguna Beach Books on March 20, 2016 in Laguna Beach, California. (Photo by JB Lacroix/WireImage)
NEW YORK, NY - MARCH 16: Kristin Cavallari visits the SiriusXM Studios on March 16, 2016 in New York City. (Photo by Taylor Hill/Getty Images)
NEW YORK, NY - MARCH 15: Actress Kristin Cavallari is seen on 'Good Morning America' on March 15, 2016 in New York City. (Photo by James Devaney/GC Images)
NEW YORK, NY - MARCH 14: Kristin Cavallari attends the BELLA New York March/April 2016 Ladies Night Out cover launch party at Punto Space on March 14, 2016 in New York City. (Photo by Mike Pont/WireImage)
NEW YORK, NY - FEBRUARY 02: Kristin Cavallari is seen in the Lower East Side on February 2, 2016 in New York City. (Photo by Alo Ceballos/GC Images)
NEW YORK, NY - FEBRUARY 12: Kristin Cavallari attends the Go Red For Women Red Dress Collection during Mercedes-Benz Fashion Week Fall 2015 at The Theatre at Lincoln Center on February 12, 2015 in New York City. (Photo by Eugene Gologursky/WireImage)
NEW YORK, NY - FEBRUARY 12: Kristin Cavallari attends the Go Red For Women Red Dress Collection 2015 presented by Macy's fashion show during Mercedes-Benz Fashion Week Fall 2015 at Lincoln Center on February 12, 2015 in New York City. (Photo by Mike Coppola/Getty Images for Go Red)
DORAL, FL - JANUARY 25: Kristin Cavallari attends the Venue Magazine Official Miss Universe after party at Trump National Doral on January 25, 2015 in Doral, Florida. (Photo by Alexander Tamargo/Getty Images for Venue Magazine)
CHICAGO, IL - SEPTEMBER 09: Kristin Cavallari attends Michigan Avenue Magazine's Fall Fashion Issue Celebration With Kristin Cavallari at W Chicago Lakeshore on September 9, 2014 in Chicago, Illinois. (Photo by Jeff Schear/Getty Images for Michigan Avenue Magazine)
CHICAGO, IL - OCTOBER 10: Kristin Cavallari stops by ULTA Beauty's Kiss Kart to support the Breast Cancer Research Foundation at Pioneer Court on October 10, 2013 in Chicago, Illinois. (Photo by Tasos Katopodis/Getty Images for ULTA Beauty)
SOUTHLAKE, TX - SEPTEMBER 21: Kristin Cavallari promotes Kristin Cavallari by Chinese Laundry at Francesca's in Southlake Town Center on September 21, 2013 in Southlake, Texas. (Photo by Peter Larsen/WireImage)
NEW YORK, NY - SEPTEMBER 10: Kristin Cavallari at Haven on September 10, 2013 in New York City. (Photo by Steve Mack/Getty Images)
NEW YORK, NY - SEPTEMBER 10: TV Personality Kristin Cavallari attends the STYLE360 After-party Celebrating Junk Food Curated by Kristin Cavallari at Haven Rooftop at The Sanctuary Hotel on September 10, 2013 in New York City. (Photo by Thomas Concordia/WireImage for STYLE360)
NEW YORK, NY - OCTOBER 19: Kristin Cavallari hosts the Bing It On Halloween Costume Challenge at Spirit Halloween on October 19, 2012 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Bing)
NEW YORK, NY - FEBRUARY 14: Kristin Cavallari attends the Dennis Basso Fall 2012 fashion show during Mercedes-Benz Fashion Week at the The Stage at Lincoln Center on February 14, 2012 in New York City. (Photo by Jerritt Clark/WireImage)
HOLLYWOOD, CA - FEBRUARY 08: Actress Kristin Cavallari attends the premiere of Twentieth Century Fox's 'This Means War' held at Grauman's Chinese Theatre on February 8, 2012 in Hollywood, California. (Photo by Alberto E. Rodriguez/Getty Images)
SANTA MONICA, CA - JANUARY 20: Kristin Cavallari arrives at the Cirque du Soleil 'OVO' celebrity opening night gala held at Santa Monica Pier on January 20, 2012 in Santa Monica, California. (Photo by Michael Tran/FilmMagic)
LOS ANGELES, CA - DECEMBER 07: Kristin Cavallari at Rebecca Taylor Robertson Store Opening on December 7, 2011 in Los Angeles, California. (Photo by Alexandra Wyman/Getty Images for Rebecca Taylor)
LOS ANGELES, CA - JANUARY 25: Kristin Cavallari and Jay Cutler visit the Grove on January 25, 2012 in Los Angeles, California. (Photo by David Aguilera/BuzzFoto/FilmMagic)
LOS ANGELES, CA - NOVEMBER 20: Actress Kristin Cavallari arrives at the Rolling Stone 2nd Annual AMA after-party at Rolling Stone Restaurant And Lounge on November 20, 2011 in Los Angeles, California. (Photo by Allen Berezovsky/Getty Images)
LOS ANGELES, CA - NOVEMBER 08: Kristin Cavallari is seen shopping at The Grove on November 8, 2011 in Los Angeles, California. (Photo by JB Lacroix/WireImage)
HOLLYWOOD, CA - NOVEMBER 09: Kristin Cavallari attends KIIS FM's 9th annual 'Pick Your Purse' party at Station Hollywood at W Hollywood Hotel on November 9, 2011 in Hollywood, California. (Photo by Jason LaVeris/FilmMagic)
WEST HOLLYWOOD, CA - OCTOBER 18: Kristin Cavallari attends P.S. Arts' 20th anniversary celebration at Sunset Tower on October 18, 2011 in West Hollywood, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - NOVEMBER 07: TV personality Kristin Cavallari arrives at Relativity Media's 'Immortals' premiere presented in RealD 3 at Nokia Theatre L.A. Live at Nokia Theatre L.A. Live on November 7, 2011 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images)
LAS VEGAS, NV - DECEMBER 03: Actress Kristin Cavallari makes an in store appearance at Dillard's Shoe department as spokesperson for Chinese Laundry at Fashion Show Mall on December 3, 2011 in Las Vegas, Nevada. (Photo by Marcel Thomas/FilmMagic)
DANCING WITH THE STARS THE RESULTS SHOW - 'Episode 1310A' - Each of this season's 12 couples returned to the dance floor for a special performance, on the two-hour Season Finale of 'Dancing with the Stars the Results Show' on TUESDAY, NOVEMBER 22 (9:00-11:00 p.m., ET). (Photo by Adam Taylor/ABC via Getty Images) KRISTIN CAVALLARI, MARK BALLAS
WEST HOLLYWOOD, CA - DECEMBER 12: Actress Kristin Cavallari attends the Alice + Olivia By Stacey Bendet holiday party for Baby Buggy at The London on December 12, 2011 in West Hollywood, California. (Photo by Donato Sardella/WireImage)
LOS ANGELES, CA - NOVEMBER 15: Actress Kristin Cavallari arrives at the premiere of Screen Gems' 'Burlesque' at Grauman�s Chinese Theater on November 15, 2010 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
Kristin Cavallari attends The Blonds Spring 2011 during Mercedes-Benz Fashion Week at MAC and Milk Studio on September 16, 2010 in New York City.
NEW YORK - SEPTEMBER 14: Kristin Cavallari attends the Luca Luca Spring 2011 fashion show during Mercedes-Benz Fashion Week at The Studio at Lincoln Center on September 14, 2010 in New York City. (Photo by Eugene Gologursky/WireImage)
©2010 RAMEY PHOTO NO SPAIN/NO ITALY Los Angeles, October 14th 2010 KRISTIN CAVALLARI shows off her curves in a tight sweater before visiting the Neil George Salon in Beverly Hills, CA. PGpg68 (Photo by Philip Ramey/Corbis via Getty Images)
NEW YORK - SEPTEMBER 12: Kristin Cavallari attends the Malandrino Spring 2011 fashion show during Mercedes-Benz Fashion Week at Grand Promenade Avery Fisher Hall on September 12, 2010 in New York City. (Photo by Jason Kempin/Getty Images for IMG)
NEW YORK - SEPTEMBER 11: Kristin Cavallari is seen around Lincoln Center during Mercedes-Benz Fashion Week on September 11, 2010 in New York City. (Photo by Katy Winn/Getty Images for IMG)
©2010 RAMEY PHOTO NO SPAIN/NO ITALY Los Angeles, Sep 09 2010 KRISTIN CAVALLARI looks great while attending a doctor's appointment in Beverly Hills, CA. PGpg68 (Photo by Philip Ramey/Corbis via Getty Images)
©2010 RAMEY PHOTO NO SPAIN/NO ITALY Los Angeles, Aug, 25, 2010 KRISTIN CAVALLARI looks great on white shorts, after getting her hair done at the Neil George Salon in Beverly Hills, CA. PGpg68 (Photo by Philip Ramey/Corbis via Getty Images)
LOS ANGELES, CA - AUGUST 11: Kristin Cavallari attends the U.S. launch party for the New BlackBerry Torch on August 11, 2010 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
Kristin Cavallari attends the grand opening of Kiehl's Since 1851 skincare store at Westfield Topanga on August 4, 2010 in Canoga Park, California.
Actress Kristin Cavallari arrives at the Los Angeles Premiere 'Salt' at Grauman's Chinese Theatre on July 19, 2010 in Hollywood, California.
Actress Kristin Cavallari arrives at the 21st Annual MuchMusic Video Awards on June 20, 2010 in Toronto, Canada. (Photo by Isaiah Trickey/FilmMagic)
Actress Kristin Cavallari hosts the Dolce After Party at the Dolce Social Ballroom NightClub on June 20, 2010 in Toronto, Canada. (Photo by George Pimentel/WireImage)
Television personality Kristin Cavallari arrives to host a pool party at Wet Republic At MGM Grand on June 19, 2010 in Las Vegas, Nevada. (Photo by Steven Lawton/FilmMagic)
BELLE PICTURES/©2009 RAMEY PHOTO May 24, 2009, Malibu, California Kristin Cavallari has a party for friends at a beach house in Malibu. NO FRANCE, NO GERMANY JMI (Photo by Philip Ramey/Corbis via Getty Images)
May 8, 2009 Century City, Ca.; Kristin Cavallari; 16th Annual Race To Erase MS; Held at the Hyatt Regency Century Plaza (Photo by Gregg DeGuire/FilmMagic)
BEVERLY HILLS, CA - MAY 16: Kristin Cavallari sighting at KOI restaurant on May 16, 2009 in Beverly Hills, California. (Photo by David Aguilera/BuzzFoto/FilmMagic)
Kristin Cavallari during Los Angeles Premiere of 'Yellow' - Arrivals at The Landmark in West Los Angeles, California, United States. (Photo by Mark Sullivan/WireImage)
Kristin Cavallari during Kari Feinstein MTV Movie Awards Style Lounge - Day 2 at Private Residence in Los Angeles, California, United States. (Photo by Alexandra Wyman/WireImage for Kari Feinstein PR)
Kristin Cavallari (Photo by John Stanton/WireImage)
Kristin Cavallari during Movieline's Hollywood Life 9th Annual Young Hollywood Awards - Arrivals at Music Box at The Fonda in Hollywood, California, United States. (Photo by Jon Kopaloff/FilmMagic)
Kristin Cavallari (Photo by Bruce Gifford/FilmMagic)
Kristin Cavallari during Victoria's Secret PINK 'Rally at the Raleigh' Spring Break Event at The Raleigh Hotel in Miami Beach, FL, United States. (Photo by Rodrigo Varela/WireImage)
Kristin Cavallari during Kristin Cavallari In-Store Appearance For Bongo Clothing Line At Kohl's - December 9, 2006 at Newport Center Mall in Jersey City, New Jersey, United States. (Photo by Jason Kempin/FilmMagic)
Kristin Cavallari during The SeenON.com Launch Party - Inside at Boulevard3 in Hollywood, California, United States. (Photo by John Shearer/WireImage)
Kristin Cavallari during 'Tenacious D: In the Pick of Destiny' Los Angeles Premiere - Arrivals at Grauman's Chinese Theater in Hollywood, California, United States. (Photo by Jeffrey Mayer/WireImage for New Line Cinema)
Kristin Cavallari during Genetic Denim's One-Year Anniversary and the Launch of Their Re-Vamped Collection - Red Carpet at Area in Los Angeles, California, United States. (Photo by Chris Weeks/WireImage for Alison Brod PR)
Kristin Cavallari during Baume & Mercier Club Phi Previews the 2006 Fall Collection - Red Carpet and Inside at area in Los Angeles, California, United States. (Photo by John Shearer/WireImage)
Kristin Cavallari during Genetic Denim's One-Year Anniversary and the Launch of Their Re-Vamped Collection - Red Carpet at Area in Los Angeles, California, United States. (Photo by Chris Weeks/WireImage for Alison Brod PR)
Kristin Cavallari during AOL Gold Rush Launch Party - September 12, 2006 at Les Deux in Los Angeles, California, United States. (Photo by Jon Kopaloff/FilmMagic)
Kristin Cavallari during AOL Gold Rush Launch Party - September 12, 2006 at Les Deux in Los Angeles, California, United States. (Photo by Jon Kopaloff/FilmMagic)
Kristin Cavallari during Olympus Fashion Week Spring 2007 - Seen at Bryant Park - Day 4 at Bryant Park in New York City, New York, United States. (Photo by Jean Baptiste Lacroix/WireImage)
NEW YORK - SEPTEMBER 08: Television personality Kristin Cavallari poses backstage at BCBG Max Azria Spring 2007 fashion show during Olympus Fashion Week at the Tent in Bryant Park September 8, 2005 in New York City. (Photo by Thos Robinson/Getty Images for BCBG Max Azria)
Kristin Cavallari during 2006 Teen Choice Awards - Arrivals at Gibson Amphitheatre in Universal City, California, United States. (Photo by Jeff Kravitz/FilmMagic, Inc)
Kristin Cavallari during Kristin Cavallari Shops at Victoria's Secret Pink at Victoria's Secret at The Grove in Los Angeles, California, United States. (Photo by J. Vespa/WireImage for Alison Brod PR)
Kristin Cavallari during Kristin Cavallari Shops at Victoria's Secret Pink at Victoria's Secret at The Grove in Los Angeles, California, United States. (Photo by J. Vespa/WireImage for Alison Brod PR)
Kristin Cavallari during Kristin Cavallari Shops at Victoria's Secret Pink at Victoria's Secret at The Grove in Los Angeles, California, United States. (Photo by J. Vespa/WireImage for Alison Brod PR)
Kristin Cavallari during Kristin Cavallari Shops at Victoria's Secret Pink at Victoria's Secret at The Grove in Los Angeles, California, United States. (Photo by J. Vespa/WireImage for Alison Brod PR)
Kristin Cavallari during T-Mobile Sidekick 3 Launch - Arrivals at 6215 Sunset Blvd in Hollywood, California, United States. (Photo by Jon Kopaloff/FilmMagic)
Kristin Cavallari during 'The Lake House' Los Angeles Premiere - Arrivals at Cineramadome in Hollywood, California, United States. (Photo by Jon Kopaloff/FilmMagic)
Kristin Cavallari during Madonna Confessions on a Dance Floor Tour - Tour Opener at The Forum in Inglewood, California, United States. (Photo by KMazur/WireImage)
Kristin Cavallari during Nickelodeon's 19th Annual Kids' Choice Awards - Arrivals at Pauley Pavilion in Westwood, California, United States. (Photo by Gregg DeGuire/WireImage)
Kristin Cavallari during PETA's 25th Anniversary Gala and Humanitarian Awards Show - Arrivals at Paramount Studios in Hollywood, California, United States. (Photo by Gregg DeGuire/WireImage)
Kristin Cavallari during 'The Man' Los Angeles Premiere - Arrivals at ArcLight Cinerama Dome in Hollywood, California, United States. (Photo by Jon Kopaloff/FilmMagic)
Kristin Cavallari and Steven from 'Laguna Beach' at Vitamin Water (Photo by Chris Weeks/WireImage)
Kristin Cavallari during 2005 MTV Video Music Awards - White Carpet at American Airlines Arena in Miami, Florida, United States. (Photo by John Shearer/WireImage)
Kristin Cavallari during Kristin Cavallari from 'Laguna Beach' Visits MTV's 'TRL' - July 25, 2005 at MTV Studios in New York City, New York, United States. (Photo by Shawn Ehlers/WireImage)
Kristin Cavallari during Pioneer Electronics Party at Montmartre Lounge in Hollywood, California, United States. (Photo by Jon Kopaloff/FilmMagic)
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WATCH: Kristin Cavallari Celebrates Daughter Saylor's First Christmas With Matching Holiday Pajamas

Back in March, the former Hills star spoke with ET about how she's been dealing with her painful loss, and how her newborn daughter helped her cope and heal.

"I've really found a lot of strength in my kids," she shared, adding that she "couldn't collapse" while dealing with her brother's death because she "had a newborn baby to look over."

"I had to be strong for her and my whole family, so, that's what I've been doing," Kristin said at the time. Check out the video below to hear more from her emotional interview.


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