[2] Nelken wrote and directed Fifteen Minutes, a short film that premiered at the USC First Look Festival.
From 1998 to 2001, Nelken and DePaul wrote several screenplays,[3] including Saving Silverman released in 2001.
Mama's Boy was produced in 2007 by Warner Independent Pictures and starred Jon Heder, Diane Keaton, Jeff Daniels and Anna Faris.
A spec project, a modern adaptation of Mr. Blandings Builds His Dream House, got turned into Are We Done Yet?
In 2016, Nelken was set to write a feature film about Speedy Gonzales for Warner Bros, with Mexican actor Eugenio Derbez attached to star and produce.