Coolidge saddles up for 'Gentlemen Broncos'

Matt Baron/BEI/Rex Features

American Pie actress Jennifer Coolidge has signed to star in Gentleman Broncos.

The comedy is based on a script by Napoleon Dynamite writer/director Jared Hess and his wife Jerusha. Hess will also direct.

Coolidge will play the mother of a high school outcast (Michael Angarano), who attends a fantasy writers' convention only to have his story Yeast Lords stolen by a legendary author.

Sam Rockwell (Snow Angels) and Flight Of The Conchords star Jemaine Clement will also appear.