Zach Galifianakis has had a great fall.

Following his big splash with summer's $461 million grosser "The Hangover," Galifianakis has scooped up a batch of film roles. Now, he's entered negotiations to voice the Humpty Dumpty character in "Shrek" spinoff "Puss in Boots."

Tom Wheeler is writing the screenplay for the prequel, which will feature the voices of Antonio Banderas and Salma Hayek in a story about the events leading up to the feline assassin's first meeting with Shrek & Co. in the second film.

Chris Miller, who co-directed and co-wrote "Shrek the Third," wrote an earlier draft of the "Puss" screenplay and is directing the DreamWorks Animation movie.

"Puss" is set to unspool in Nov. 4, 2011. The character Puss in Boots also co-stars in DWA's fourth installment of "Shrek," May 21 opener "Shrek Forever After."

Repped by CAA and Brillstein Entertainment Partners, Galifianakis recently joined the casts of the Jay Roach-directed Paramount/DreamWorks/Spyglass comedy "Dinner for Schmucks"; Warner Bros.' Todd Phillips-helmed laugher "Due Date," opposite Robert Downey Jr.; the Ryan Fleck-Anna Boden-directed drama "It's Kind of a Funny Story" from Focus Features; and a sequel to "The Hangover," which Warners has tagged for summer 2011.

The HBO series "Bored to Death," on which Galifianakis appears, recently was renewed for a second season.