If there's one thing you can rely on "Saturday Night Live" for, it's delivering good celebrity impressions -- so goods the stars show up themselves.

Thompson is the longest running cast member on SNL with many of his fellow cast ... The comedian’s imitations include Ellen Degeneres, Hillary Clinton, Rudy Giuliani and Dr. Anthony Fauci.

Of course everyone's favorite "SNL" cast is the one they grew up with ... honing her comedy muscle (and Hillary Clinton impression) to a sharp edge. She was a force in sketches and on Weekend ...

Kenan Thompson leads the pack with 22 seasons, but find out which former cast members have served 10 or more seasons on the sketch show ...