Peter Billingsley (born April 16, 1971), also known as Peter Michaelsen and Peter Billingsley-Michaelsen, is an American actor, director, and producer. His acting roles include Ralphie Parker in the 1983 movie A Christmas Story, Jack Simmons in The Dirt Bike Kid, Billy in Death Valley, and as Messy Marvin in Hershey's chocolate syrup commercials during the 1980s. He began his career as an infant in television commercials.