Mad Men star Jon Hamm joins ‘Howl’

Mad Men star Jon Hamm has joined the cast of James Franco’s indie project Howl

Scripted by Rob Epstein and Jeffrey Friedman.The project is based on the obscenity trial surrounding Allen Ginsberg’s famed poem. Hamm will play defence attorney Jake Ehrlich, who was the inspiration for TV crime drama Perry Mason.

aJames Franco, Mary-Louise Parker, Jeff Daniels, David Strathairn and Jeff Daniels are also signed up for the cast.