The Midnight, Texas star took to social media on Saturday to alert fans that her older sister, Julia Kebbel, was missing, and she was hoping the public could help find her.
" ALERT My SiSTER Julia Kebbel is MISSING. Her Instagram and Twitter is @jkebbz pls go there to see more pictures of her," she tweeted. If you have seen her or know anything about her, pls DM me, contact the police or pls call Dennis at 407-739-8991 . Pls RT share this info with everyone."
Arielle shared even more information on Instagram, explaining that Julia had been walking her dog in the Los Angeles neighborhood of Silver Lake, including a detailed description of both her sister and the pup, a chocolate lab named Cindy Crawford.
Arielle's sister was still missing as of Sunday, so the 32-year-old actress took to Twitter and Instagram once again to plea for her sibling's return alongside a missing person's poster. According to the second social media post, her sister had been gone for about four days.
"My sister Julia is still missing. Pls read, repost print & distribute," she wrote. "She was last seen Wed night in Silver Lake. Thank you all so much for your support. We are so grateful. #bringjuliahome #juliakebbel #silverlake #echopark #dtla #losfeliz #grifithpark #elysianpark."
See photos of Arielle Kebbel:
Arielle Kebbel out and about
Arielle Kebbel out and about
LOS ANGELES, CA - JANUARY 13: Arielle Kebbel attends ASSET 10th Anniversary Event at Private Residence on January 13, 2018 in Los Angeles, California. (Photo by Michael Bezjian/Getty Images)
BEVERLY HILLS, CA - JANUARY 07: Actor Arielle Kebbel attends 19th Annual Post-Golden Globes Party hosted by Warner Bros. Pictures and InStyle at The Beverly Hilton Hotel on January 7, 2018 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)
TOLUCA LAKE, CA - NOVEMBER 05: Arielle Kebbel attends the Creative Coalition/Novocure Voices of Impact Dinner on November 5, 2017 in Toluca Lake, California. (Photo by Araya Diaz/Getty Images for The Creative Coalition/Novocure)
WEST HOLLYWOOD, CA - NOVEMBER 15: Arielle Kebbel attends the Hollywood Foreign Press Association and InStyle celebrate the 75th Anniversary of The Golden Globe Awards at Catch LA on November 15, 2017 in West Hollywood, California. (Photo by Rich Fury/Getty Images)
MILAN, ITALY - SEPTEMBER 22: Arielle Kebbel attends theVogue Italia 'The New Beginning' Party during Milan Fashion Week Spring/Summer 2018 on September 22, 2017 in Milan, Italy. (Photo by Venturelli/Getty Images)
WEST HOLLYWOOD, CA - SEPTEMBER 15: Arielle Kebbel arrives at Entertainment Weekly's 2017 Pre-Emmy Party held at Sunset Tower Hotel on September 15, 2017 in West Hollywood, California. (Photo by Michael Tran/FilmMagic)
COMIC-CON INTERNATIONAL: SAN DIEGO 2017 -- ''NBC Party' -- Pictured: (l-r) Arielle Kebbel, Peter Mensah at the Oxford Social Club at Pendry, San Diego, Calif. -- (Photo by: Mark Davis/NBC)
COMIC-CON INTERNATIONAL: SAN DIEGO 2017 -- ''NBC Party' -- Pictured: Arielle Kebbel at the Oxford Social Club at Pendry, San Diego, Calif. -- (Photo by: Randy Shropshire/NBC)
SAN DIEGO, CA - JULY 22: (L-R) Dylan Bruce, Arielle Kebbel and Francois Arnaud at Entertainment Weekly's annual Comic-Con party in celebration of Comic-Con 2017 at Float at Hard Rock Hotel San Diego on July 22, 2017 in San Diego, California. (Photo by Todd Williamson/Getty Images for Entertainment Weekly)
COMIC-CON INTERNATIONAL: SAN DIEGO 2017 -- ''Midnight, Texas' Panel' -- Pictured: Arielle Kebbel at the San Diego Convention Center, San Diego, Calif. -- (Photo by: Mark Davis/NBC/NBCU Photo Bank via Getty Images)
SAN DIEGO, CA - JULY 22: Arielle Kebbel arrives at Entertainment Weekly's Annual Comic-Con Party at Float at Hard Rock Hotel San Diego on July 22, 2017 in San Diego, California. (Photo by Jerod Harris/Getty Images)
SAN DIEGO, CA - JULY 22: Actress Arielle Kebbel attends 'Midnight Texas' press line at Comic Con 2017 - Day 3 on July 22, 2017 in San Diego, California. (Photo by Jerod Harris/WireImage)
COMIC-CON INTERNATIONAL: SAN DIEGO 2017 -- 'Midnight, Texas Book Signing' -- Pictured: Arielle Kebbel at the 'Midnight, Texas' Activation at Tin Fish, San Diego, Calif. -- (Photo by: Mark Davis/NBC/NBCU Photo Bank via Getty Images)
SAN DIEGO, CA - JULY 21: Francois Arnaud, Arielle Kebbel and Parisa Fitz-Henley attend SiriusXM's Entertainment Weekly Radio Channel Broadcasts From Comic Con 2017 at Hard Rock Hotel San Diego on July 21, 2017 in San Diego, California. (Photo by Vivien Killilea/Getty Images for SiriusXM)
NBCUNIVERSAL EVENTS -- New Talent Mixer -- Pictured: (l-r) Arielle Kebbel, 'Midnight, Texas,' and Josh Radnor, 'Rise' -- (Photo by: Cindy Ord/NBC/NBCU Photo Bank via Getty Images)
NBCUNIVERSAL EVENTS -- New Talent Mixer, NBC Portrait Studio -- Pictured: Arielle Kebbel, 'Midnight, Texas' -- (Photo by: Patrick Randak/NBC/NBCU Photo Bank via Getty Images)
AUSTIN, TX - JUNE 08: Arielle Kebbel attends the ATX Television Festival at The Paramount Theater on June 8, 2017 in Austin, Texas. (Photo by Rick Kern/WireImage)
LOS ANGELES, CA - MAY 06: Actor Arielle Kebbel attends City Year Los Angeles Spring Break on May 6, 2017 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images for City Year Los Angeles)
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In a statement obtained by ET on Sunday night, Arielle's rep shared the same description of Julia, as well as a statement from Arielle.
“My family and I are asking for any and all information that may help in our search for my sister, Julia,” the Midnight, Texas actress said. "We are so grateful and touched by the incredible support we have received from everyone. We are hopeful that she is safe and will not stop looking until she is back home with us.”
Some of Arielle's famous friends have helped spread the word, with Bryan Greenberg and her UnREAL and Life Unexpected co-star, Shiri Appleby, retweeting her, and Pitch Perfect actress Kelley Jakle and Supergirl star Odette Annable sharing the message on Instagram.
The last photo Julia shared to Instagram was a post of her dog back on Jan. 26, while her Twitter hasn't been updated since September 2016.