These celebrity impressions on SNL were hilarious! For this list, well be looking at the funniest and most memorable responses that celebrities had to Saturday Night Live cast members lampooning them. Our countdown includes Will Ferrell as Alex Trebek, Larry David as Bernie Sanders, Brad Pitt as Dr. Anthony Fauci, and more! Which SNL cast member do you think does the best celebrity impressions? Let us know in the comments. Watch more great Saturday Night Live videos here: Top 20 Saturday Night Live Sketches That Went Wrong: