Hard to believe It's been over 20 years since actor Jaleel White last appeared as character Steve Urkel on Family Matters, but now he's ready to make a comeback as the beloved and nerdy character -- only this time it'll be in animated form. He recently confirmed on social media that he'll be appearing as Urkel in an upcoming premiere episode of "Scooby-Doo and Guess Who?" on the Boomerang streaming service. The new series premiers on June 27.