David Alan Coulier ( kool-YAY; born September 21, 1959) is an American actor and comedian. He is best known for his roles as Joey Gladstone on the ABC sitcom Full House, Peter Venkman on The Real Ghostbusters, and Animal and Bunsen Honeydew on Muppet Babies. He was also in the 2007 Christmas movie The Family Holiday. (Via Wikipedia)