Around the time Keegan-Michael Key joined the cast as a featured performer, it was assumed that Key would be chosen over Peele. The two of them ultimately were cast together after showing great comedic chemistry. Peele performed celebrity impersonations, which included favorites Caroll Spinney (as the voice of Big Bird), Ja Rule, James Brown, Flavor Flav, Justin Guarini, Montel Williams, Morgan Freeman, and Forest Whitaker.