Just as Colin Quinn and Pee-wee Herman launch their own new Broadway productions, word from the street brings even more casting news for spring 2011, with parts for both Robin Williams and Chris Rock to make their Broadway acting debuts.

Williams will star as the titular tiger in Rajiv Joseph's play Bengal Tiger at the Baghdad Zoo, starting March 10, 2011, with an official opening March 31 at a theater to be announced.

Rock, meanwhile, will join Bobby Cannavale, Elizabeth Rodriguez, Annabella Sciorra and Yul Vazquez in Stephen Adly Guirgis' Motherf**ker with the Hat, playing the sobriety sponsor of Cannavale's character. That play is slated for previews March 22, 2011, with an opening on April for a limited run at the Gerald Schoenfeld Theatre.

(via Playbill)