Thomas Mann has been set to star opposite Victoria Justice in Josh Schwartz's Fun Size, which is described as a cross between Superbad and Adventures In Babysitting, set on Halloween. Also, Thomas Mann is in final negotiations to join James Marsden and Claire Danes in the indie As Cool As I Am.

In Fun Size, Thomas Mann will play Roosevelt, the star of his school's debate team who is in love with Victoria Justice's character, Wren. The son of two gay women, he's terrified of breaking the rules, but decides to throw caution to the wind and help Wren out when she needs him to help find her younger brother on Halloween.

Max Mayer is directing from a script by Virginia Korus Spragg, based on the novel by Pete Fromm.

As Cool As I Am follows a 16-year old Montana girl with a turbulent home life. James Marsden and Claire Danes are playing the parents, while Thomas Mann will play her best friend who comes to fall in love with her.

As Cool As I Am is scheduled to start production next month in New Mexico.