An All-Star Toast to the Improv [1355548] Released: 1988-01-30 Revenue: $0 Budget: $0 Profit: $0 Runtime: 60 mins Popularity: 0.5342 Vote Average: 0 Vote Count: 0 Overview: To celebrate the "birthday" of the famous Improv comedy club, 6 famous comedians get up on stage and do their thing. However, to make things interesting, while each one does his particular routine, the other 5 comics sit at the back of the stage and heckle the performer. This video is especially notable for Martin Mull issuing a zinger at Robin Williams that shuts-up the otherwise motor-mouthed comic for at least 5 seconds. Cast [6] Robert KleinSelf Billy CrystalSelf Robin WilliamsSelf Martin MullSelf Richard LewisSelf Paul RodrÃguezSelf Trailers