Matthew McConaughey as Tripp
Sarah Jessica Parker as Paula
Zooey Deschanel as Katherine "Kit"
Justin Bartha as Ace
Bradley Cooper as Demo
Terry Bradshaw as Al
Kathy Bates as Sue
Tyrel Jackson Williams as Jeffrey
Katheryn Winnick as Melissa
Rob Corddry as Gun Salesman
Patton Oswalt as Techie Guy

Wikipedia contributors, "Failure to Launch," Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/w/index.php?title=Failure_to_Launch&oldid=404275638 (accessed January 28, 2011).