In Hollywood, Law and Order: Special Victims Unit has become a rite of passage for actors, athletes and musicians alike.

There have been so many celebrity cameos on the crime drama, it's easy to forget that some of your favorite stars have made an appearance, or two, on the hit series.

And seeing how the show has been on television for nearly two decades, it's no surprise celebs keep landing major guest starring roles alongside Mariska Hargitay and Ice-T right before making it big.

Scroll through the images for a look back at celebs you totally forgot guest-starred on SVU.