30 Rock Cameos

For decades, 'Saturday Night Live' was the place where stars went to show off their funny sides and allow fans and viewers to see them in a different light. So it should come as no surprise that NBC's flagship comedy 30 Rock' - which was created by 'SNL' alumni and revolves around an 'SNL'-style variety show - has taken over the mantle of the hot place to find your offbeat celebrity cameos.

Over the show's first three seasons, everyone from Carrie Fisher to Steve Martin to Pee-wee Herman has come on the show, some for a just a quick cameo and others for longer stints as guest stars. To celebrate the premiere of the show's fourth season, we thought it was a good time to look back and take stock of some of the best '30 Rock' celebrity cameos so far.