Sean Penn a Stooge?

Sean Penn will be following up his Oscar winning turn as Harvey Milk with a role that can be literally considered a slap in the face. Variety magazine reports that Penn has reportedly signed on to portray Larry in the Farrelly Brothers new Three Stooges flick which is to begin production in the fall for release in 2010.
In addition to Penn, the Farrelly's are in negotiations with Jim Carrey to portray Curly and are attempting to snag Benicio Del Toro for Moe. Carrey is apparently planning to gain 40 pounds for the role instead of going with a fat suit, but no mention has been made as to weather he'll be shaving his head.
The film is supposed to be an actual Three Stooges movie and not a behind the scenes biopic about the lives of the legendary funny men.