"Law and Order: Special Victims Unit" has seen a lot of famous faces through the years. From the cast members who've made careers on the show (like star Mariska Hargitay, seen here as Lt. Olivia Benson) to the superstars who've made guest appearances way before they were household names, it might actually be easier to list who hasn't been on the show! In honor of the crime drama's return to our television screens on Sept. 21, 2016, for its 18th season, Wonderwall.com is taking a look at the surprising celebs who've done stints on the show. Keep reading for more…
A young Sarah Hyland played Jennifer Banks on the Season 3 premiere of "Law and Order: SVU." The episode was titled "Hothouse," and Sarah's character was a suspect in the murder of her roommate. Spoiler alert: Jennifer was responsible — she pushed her roommate into a river and the girl drowned.
RELATED: 10 reasons we love Sarah
Bradley Cooper appeared on Episode 20 of Season 6 of "Law and Order: SVU," titled "Night." The hunky actor played an estate lawyer named Jason Whitaker way back in 2005. His character was the defense attorney for a man accused of being a serial rapist.
RELATED: Bradley's life in pictures
A young Kate Mara can be spotted on Season 2, Episode 9 of "Law and Order: SVU." The 2001 episode, called "Pixies," had Kate playing a young gymnast named Lori who ended up being a murderer.
You can catch John Stamos on Season 12 of "Law and Order: SVU." He played Ken Turner, a big-shot attorney and "reproductive abuser" on Episode 22, titled "Bang."
Guest-starring on this show isn't just for actors! Miranda Lambert's sole acting credit happens to be on an episode of "Law and Order: SVU." The country crooner appeared on a Season 13 episode in 2012 titled "Father's Shadow." She played a rape victim named Lacey Ford.
A young Amanda Seyfried made an appearance back in 2004 on Season 6, Episode 5 of "Law and Order: SVU" in an episode titled "Outcry." She played a character named Tandi McCain, a student who was raped.
Way before he starred on "The Vampire Diaries," Ian Somerhalder appeared on "Law and Order: SVU." The future vampire landed a role on an episode titled "Dominance," which saw him playing Charlie Baker, a murderer, rapist and kidnapper.
At just 8 years old, Abigail Breslin landed a role on "Law and Order: SVU." On the Season 6 premiere episode, "Birthright," the young actress played Patty Branson, a 6-year-old abducted in Central Park.
A few years after wrapping up her iconic role as legal eagle Miranda Hobbes on "Sex and the City," Cynthia Nixon appeared on a 2007 episode of "Law and Order: SVU" titled "Alternate." In the Season 9 episode, Cynthia played Janis Donovan, a woman with Dissociative Identity Disorder who was accused of harming her daughter but later found not guilty due to her mental disability.
Martha Stewart got in on the "Law and Order: SVU" action during Season 13. The lifestyle guru appeared on Episode 22, "Learning Curve," as a character named Eleanor Hastings. That particular show chronicled a seres of hate crimes.
In 2010, a few years after Mischa Barton wrapped up her role on "The O.C.," she made a one-episode appearance during Season 11 of "Law and Order: SVU." Mischa played Gladys Dalton, a former prostitute who left Olivia Benson in charge of her premature baby.
The one and only Mike Tyson made an appearance on "Law and Order: SVU" in 2013. On a Season 14 episode called "Monster's Legacy," Mike played Reggie Rhodes, a convicted murderer and death row inmate.
Before he landed the role of Olivia Pope's sometime love interest Jake Ballard on "Scandal," Scott Foley played Dalton Rindell — a man who wakes up in a bloody apartment with a dead woman in his bed — on a 2009 "Law and Order: SVU" episode.
At 12, Keke Palmer took on the role of Tasha Wright on a Season 7 episode of "Law and Order: SVU" titled "Storm." In the episode, Keke's character loses her whole family during Hurricane Katrina and finds herself in New York City.
Ludacris appeared not once but twice on "Law and Order: SVU." Both times, Luda played Darius Parker, a relative of detective Odafin Tutuola. Darius ends up being one of the bad guys, a man who murdered a woman and her infant son because he believed the woman to be a bad mother.
Elle Fanning made her "Law and Order: SVU" debut on Season 8, Episode 8, titled "Cage." The actress played Eden, a foster child who was found in a van driven into the river.
Back in 2002, long before he took on the beloved role of Phil Dunphy on "Modern Family," Ty Burrell turned up on "Law and Order: SVU." The actor played Alan Messinger in an episode titled "Execution," which told the story of a man about to be put to death.
Like her on-screen "Modern Family" hubby, Julie Bowen also popped up on a "Law and Order: SVU" episode prior to becoming a Dunphy. Julie played Gwen Sibert in a 2008 episode titled "Trials" during the show's tenth season.
Back in 2009, Hilary Duff appeared on Season 10, Episode 19, which was titled "Selfish," as Ashlee Walker, a young and irresponsible mother whose daughter dies.
James Van Der Beek as a sexual predator? The actor played Sean Albert in a Season 13 "Law and Order: SVU" episode titled "Father Dearest." The particularly disturbing episode chronicled Sean's quest to rape girls who'd been conceived with the sperm of his rival.
Way back in 2001, Elizabeth Banks popped up on small screens during Season 3, Episode 7 of "Law and Order: SVU." On an episode titled "Sacrifice," Elizabeth played Jaina Jansen, the wife of a sexual assault victim who killed her boss in what she claimed was self-defense.
"Law and Order: SVU" landed Serena Williams for a guest appearance back in 2004. The tennis superstar made a cameo on Season 5, Episode 12 playing the role of Chloe Spiers during a show about a fraternity.
Jennette McCurdy made her "Law and Order: SVU" debut at 12 on an episode titled "Contagious" during the show's sixth season. Young Jennette played Holly Purcell, a 9-year-old who survived a car accident and was raped.
Dave Navarro took a turn as a "Law and Order: SVU" guest star in 2013. The rocker played Mr. Ferrari in a Season 14 show that chronicled a pop star being beaten by her boyfriend.
In 2006, Brittany Snow made her "Law and Order: SVU" debut on Season 7, Episode 22, titled "Influence." Brittany played Jamie Hoskins, a 16-year-old who was a suspect in the death of a former student.
Kathy Griffin played Babs Duffy, the leader of a militant lesbian-rights group, on a 2010 episode of "Law and Order: SVU" called "P.C."
Jennifer Love Hewitt appeared on one episode of "Law and Order: SVU" in 2010 during the show's 12th season. On an episode titled "Behave," Jennifer played Vicki Sayers, a woman who'd been raped.
Back in 2002, Rainn Wilson played a janitor on a Season 4 episode of "Law and Order: SVU" titled "Waste."
Coco Austin made a Season 9 appearance on husband Ice-T's show in the role of Traci Bell. The episode, titled "Fight," centered around two brothers connected to a murder investigation.