Which of the following actors started his career as a children's birthday entertainer?

Explanation

Steve Martin (born 1945) is an American actor, comedian, playwright and producer. He is particularly well known for his role as a comedian in several family films. He started his career as an entertainer at children's parties, before breaking through as a stand-up comedian. He has also written the script for several of his films. Big Steve Martin hits include "The Jerk" (1979), "Roxanne" (1987) and "Parenthood" (1989).