Of all the films that Judd Apatow has directed, Funny People is absolutely spoiled for cameos. The film is expected to require the comedians’ roundtable to appear simply based on the premise. As Apatow and Adam Sandler explained in an interview Charlie Rose, the film is about their real life experiences and the worries of comedians and celebrities. Being surrounded by professional actors and joke writers is an honest look at how the other side lives. In fact, there are so many celebrities involved in the film that it’s hard to list them all individually.
The party scene celebrating Sandler’s character’s recovery from a terminal illness includes many recognizable faces, including Sarah Silverman, Dave Attell, and the late Norm McDonald. Former co-stars of Sandler’s character include Ken Jeong, Bo Burnham, and Undeclared alum Carla Gallo. Additionally, Owen Wilson and Elizabeth Banks appear on fake movie posters in-universe. Meanwhile, there are plenty of other comedians and actors with quick moves like Andy Dick, Paul Reiser, George Wallace, Charles Fleischer and the list goes on.