Paul Reubens will voice the character in ABC's Once Upon a Time spin-off, reports Deadline.
Reubens is best known for his character Pee-wee Herman, and has also appeared in Reno 911!, Ally McBeal and 30 Rock.
He has previously lent his voice talents to TV shows such as Adventure Time and Rugrats, plus movies including Eddie Murphy's Dr Dolittle, The Nightmare Before Christmas and The Smurfs.
Reubens joins Emma Rigby (Red Queen), Sophie Lowe (Alice) and Michael Socha (Knave of Hearts) in the pilot.
Once Upon a Time in Wonderland is due to start filming this Sunday (April 7) in Vancouver.