The Law and Order franchise has had the primetime TV crime procedural game on lock since the early ‘90s. With more than six series, a made-for-TV movie, and even a video game (did you know about this? How did we miss a Law & Order video game?!), Dick Wolf and the gang have been entertaining us for literally decades.

There have definitely been some flops (remember Law & Order: Trial by Jury?), but even those were a cut above the rest. There was even a study conducted that suggested watching Law & Order: Special Victims Unit is good for society!

We don’t know about you, but one of the reasons we keep tuning in is to see who is making a cameo — from musicians to fledgling actors and bona fide legends. So, just because we know you love Law & Order as much as we do, here are some of the most famous, noteworthy celebrity guest stars. Who’d we forget? Let us know, and don’t forget to SHARE this roundup with your friends!