Zach Galifianakis ("The Hangover") is in negotiations to voice the character of Humpty Dumpty in the upcoming "Shrek" spin-off "Puss in Boots" for DreamWorks Animation says The Hollywood Reporter.

The story serves as a prequel to the character's appearance in the second "Shrek" film and deals with the feline assassin's first forays as an avenger.

"Desperado" duo Antonio Banderas and Salma Hayek are reuniting to voice characters. Tom Wheeler is writing the screenplay.

Chris Miller ("Shrek the Third") wrote an earlier draft and is directing. The film opens November 2011.