Alumni of Law & Order: SVU

Before he was warning people to 'protect yourself from mayhem like me,' he played Detective Brian Cassidy for half of Season 1 until his character transferred to the narcotics unit. He would eventually return as Brian Cassidy in Season 13, but before that he appeared in Season 7 of Criminal Intent as Mike Stoat, a suspended cop.

Before getting caught up in the politics of 'House of Cards,' she appeared in Season 2 as Lori, a gymnast whose teammate was raped and killed.

He played Oliver Tunney, a convicted sex offender who would molest children while dressed as a clown, in Season 2. Jim has played five different characters in the Law & Order universe: one in SVU, two in Law & Order, and two in Criminal Intent.

He played Ted Bolger, the attorney for a company that produced teen porn, in Season 2. He also appeared a few years later as a different character on Criminal Intent.

In Season 3, she played Jaina Jansen, a woman who worked in the porn industry with her husband to pay for their daughter's medical bills.

Before he was Phil Dunphy on 'Modern Family,' he played Alan Messinger, the attorney of a soon-to-be-executed human mutilator, in Season 3.

Before she was the title character on 'Bones,' she played Cassie Germaine, a young cellist who was attacked in her apartment, in Season 3.

Before he was Gob Bluth on 'Arrested Development,' he played Tony Damon, the friend and squash partner of a recently murdered child rapist, in Season 4.

Before he was Dwight Schrute on 'The Office,' he appeared in Season 4 as a janitor at a rehab center who refused a DNA test because he was worried it might have affected his health insurance policy.

Before she was in 'Avatar' and 'Star Trek,' she was Gabrielle Vega, the supportive daughter of a heroin addict who was on trial for murder, in Season 5. She also had a recurring role in Season 10 of Law & Order as Belinca.

Before she sang in 'Mama Mia!' or 'Les Miserables,' she played Tandi McCain, a 16-year-old rape victim, in Season 6.

Before 'The Hangover,' he was Jason Whitaker, the defense lawyer for a serial rapist suspect, in Season 6. He played the same character on a crossover episode of Law & Order: Trial by Jury.

Before she was 'The Girl with the Dragon Tatoo,' she was Jessica DeLay, an assault victim who was later suspected of instigating the attack by victimizing her attackers' brother, in Season 7. Rooney's older sister Kate was also a guest star on SVU in Season 2.

Before she started getting her 'Revenge' as Emily Thorne, she played Charlotte Truex, a girl whose mother was murdered after she and her mob lawyer husband were attacked.

Before he was asking if Geico could 'really save you 15% or more on car insurance,' he had a cameo as George Trembley, the single father of an adolescent boy accused of raping younger kids, in Season 9.