8 Actors Who Appeared on "Law & Order: SVU" Before They Were Famous!

Sarah Hyland (Season 3, Episode 1: “Repression”; Season 10, Episode 12: “Hothouse”)

Sarah Hyland is one of the few guest stars to have appeared on the show twice. Her first appearance was great, but her second was very memorable. She portrayed a teenager at a competitive prestigious school that killed her roommate. She confesses to the crime during a psychotic breakdown.

It was clear from both her performances that she would have a long successful career and she has gone on to do just that. For the past 10 seasons, she has been on the super hilarious show "Modern Family" as Haley Dunphy. She was also in the remake of Dirty Dancing, the reboot of "Veronica Mars", and the upcoming movie The Wedding Year. We can expect many more projects from her in the future.