Catherine Zeta-Jones celebrates Kirk Douglas' 101st birthday with sweet post

Happy birthday, Kirk Douglas!

The legendary actor turned 101 on Saturday, and his daughter-in-law, Catherine Zeta-Jones, couldn't help but celebrate with a sweet post on Instagram. 

"101 today!!!! My darling Pappy on my knee," she captioned a pic of herself and Kirk. "Happy Birthday to my wonderful, inspirational and loving father in law, Kirk. Love you with all my heart. ❤️#hero."

Zeta-Jones married Kirk's son, Michael Douglas, in 2000, and has remained close with the icon ever since. The actress even posted a photo of herself alongside a snap of Kirk in Cannes this week. 

"'The Kirk and I' both in Cannes. Him circa 1957, me with him in 2017," she wrote alongside the shot. 

"The Kirk and I" both in Cannes. Him circa 1957, me with him in 2017.

A post shared by Catherine Zeta-Jones (@catherinezetajones) on

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Catherine Zeta-Jones and Michael Douglas together
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Catherine Zeta-Jones and Michael Douglas together
NEW YORK, NY - NOVEMBER 01: Michael Douglas and Catherine Zeta-Jones attend The Actor's Fund Career Transition For Dancers 2017 Jubilee Gala at Marriott Marquis Hotel on November 1, 2017 in New York City. (Photo by Jamie McCarthy/Getty Images)
NEW YORK, NY - NOVEMBER 01: Michael Douglas and Catherine Zeta-Jones attend Actors Fund Career Transition For Dancers Gala on November 1, 2017 at The Marriott Marquis in New York City. (Photo by Walter McBride/WireImage)
NEW YORK, NY - MAY 03: Catherine Zeta-Jones and Michael Douglas pose backstage during 'City Winery Presents A Celebration of the Music of Jimmy Webb' at Carnegie Hall on May 3, 2017 in New York City. (Photo by Al Pereira/WireImage)
NEW YORK, NY - FEBRUARY 22: (EXCLUSIVE COVERAGE) Michael Douglas and Catherine Zeta-Jones pose backstage at the hit musical 'Sunset Boulevard' on Broadway at The Palace Theater on February 22, 2017 in New York City. (Photo by Bruce Glikas/Bruce Glikas/FilmMagic)
BEVERLY HILLS, CA - FEBRUARY 08: Actor Michael Douglas and actress Catherine Zeta-Jones attend the 15th annual Movies For Grownups Awards at the Beverly Wilshire Four Seasons Hotel on February 8, 2016 in Beverly Hills, California. (Photo by Jason LaVeris/FilmMagic)
SANTA CLARA, CA - FEBRUARY 07: Actors Michael Douglas and Catherine Zeta-Jones attend Super Bowl 50 at Levi's Stadium on February 7, 2016 in Santa Clara, California. (Photo by Jeff Kravitz/FilmMagic)
NEW YORK, NY - DECEMBER 17: Michael Douglas and Catherine Zeta-Jones attend Jazz at Lincoln Center's Ertegun Atrium and Ertegun Hall of Fame grand reopening at Jazz at Lincoln Center on December 17, 2015 in New York City. (Photo by Andrew Toth/FilmMagic)
NEW YORK, NY - DECEMBER 03: Michael Douglas and Catherine Zeta Jones attend the AARP Movies for Grownups Gala Countdown Lunch with actor/producer Michael Douglas, 2016 Career Achievement Honoree, on December 3, 2015 in New York City. (Photo by Larry Busacca/Getty Images for AARP)
Actors Catherine Zeta-Jones (hat) and Michael Douglas (R) watch Flavia Pennetta of Italy play against Roberta Vinci of Italy during their 2015 US Open Women's Singles -Finals at the USTA Billie Jean King National Tennis Center on September 12, 2015 in New York. AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
NEW YORK, NY - SEPTEMBER 27: Michael Douglas and Catherine Zeta-Jones attend NYC Dance Alliance Foundation's 'Bright Lights Shining Stars' Gala at NYU Skirball Center on September 27, 2015 in New York City. (Photo by Santiago Felipe/Getty Images)
LONDON, ENGLAND - JULY 8: Catherine Zeta-Jones and Michael Douglas with their children Dylan and Carys as they attend the European Premiere of Marvel's 'Ant-Man' at the Odeon Leicester Square on July 8, 2015 in London, England.(Photo by Julian Parker/UK Press via Getty Images)
NEW YORK, NY - MAY 11: Catherine Zeta-Jones and Michael Douglas attend The 2015 Actors Fund Gala at The New York Marriott Marquis on May 11, 2015 in New York City. (Photo by Bruce Glikas/FilmMagic)
SATURDAY NIGHT LIVE 40TH ANNIVERSARY SPECIAL -- Pictured: (l-r) Michael Douglas, Catherine Zeta-Jones walk the red carpet at the SNL 40th Anniversary Special at 30 Rockefeller Plaza in New York, NY on February 15, 2015 -- (Photo by: Jamie McCarthy/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - FEBRUARY 12: (EXCLUSIVE COVERAGE) Michael Douglas and Catherine Zeta Jones pose backstage at the hit play 'It's Only a Play' on Broadway at The Jacobs Theater on February 12, 2015 in New York City. (Photo by Bruce Glikas/FilmMagic)
EAST HAMPTON, NY - JULY 06: Catherine Zeta Jones and Michael Douglas attend the 'And So It Goes' premiere at Guild Hall on July 6, 2014 in East Hampton, New York. (Photo by Sonia Moskowitz/Getty Images)
NEW YORK, NY - JANUARY 29: Michael Douglas and Catherine Zeta-Jones attend the Phoenix House Public Service Award Dinner at Cipriani 42nd Street on January 29, 2015 in New York City. (Photo by Grant Lamos IV/Getty Images)
HOLLYWOOD, CA - JUNE 05: Actress Catherine Zeta-Jones (L) and actor Michael Douglas attend the 2014 AFI Life Achievement Award: A Tribute to Jane Fonda at the Dolby Theatre on June 5, 2014 in Hollywood, California. Tribute show airing Saturday, June 14, 2014 at 9pm ET/PT on TNT. (Photo by Michael Kovac/Getty Images for AFI)
HOLLYWOOD, CA - JUNE 05: Actors Michael Douglas and Catherine Zeta-Jones arrive at the 2014 AFI Life Achievement Award Gala Tribute at Dolby Theatre on June 5, 2014 in Hollywood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
Michael Douglas and Catherine Zeta Jones attend the 41st Annual Chaplin Award Gala at Avery Fisher Hall in New York City. � LAN (Photo by Lars Niki/Corbis via Getty Images)
NEW YORK, NY - APRIL 21: Catherine Zeta-Jones and Michael Douglas attends the 14th annual Monte Cristo Award at The Edison Ballroom on April 21, 2014 in New York City. (Photo by Walter McBride/WireImage)
Michael Douglas & Catherine Zeta Jones arriving for the 40th Annual Chaplin Award Gala Honoring Barbra Streisand at Avery Fisher Hall in New York City on 4/22/2013... (Photo by Walter McBride/Corbis via Getty Images)
Actor Michael Douglas and Catherine Zeta Jones on the red carpet at the 85th Academy Awards (Oscars) held at the Dolby Theater in Hollywood. (Photo by Frank Trapper/Corbis via Getty Images)
NEW YORK, NY - JANUARY 31: Actors Michael Douglas and Catherine Zeta-Jones attend the Open Road, The Cinema Society & Michael Kors premiere of 'Side Effects' at AMC Loews Lincoln Square on January 31, 2013 in New York City. (Photo by Charles Eshelman/FilmMagic)
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