[3] Horberg was born in Chicago, Illinois, where, in his first venture into film, he owned and operated the downtown repertory Sandburg Movie Theatre from 1979 to 1981.
While at Paramount he oversaw the development and production of such films as Ghost, The Naked Gun 2½: The Smell of Fear, Dead Again, Regarding Henry, Soapdish, The Addams Family and The Godfather Part III.
He also produced the HBO film Poodle Springs based on the unfinished novel by Raymond Chandler and adapted by Tom Stoppard, along with Charlie Countryman.
In 2005, Horberg became President of Production at Sidney Kimmel Entertainment,[11] where he produced or executive produced Talk to Me,[12] Death at a Funeral, Married Life,[13] Lars and the Real Girl,[14] Synecdoche, New York[15] the directorial debut of Oscar-winning screenwriter Charlie Kaufman, The Kite Runner[16] based on the best-selling book by Khaled Hosseini, and Milk.
[17] Most recently he founded an independent company, Wonderful Films, which in 2010 co-produced Death at a Funeral[18] and Don't Be Afraid of the Dark.