From Wikipedia, the free encyclopedia. Sam Lerner  (born September 27, 1992) is an American teen actor, who made his major debut as the role of Chowder in the 2006 Oscar-nominated computer-animated film, Monster House. Lerner also played a lead role in the feature film Envy as the son of Ben Stiller and Rachel Weisz. Lerner was a series regular on the Brett Ratner-directed "Untitled Diamond-Weissman pilot" for CBS-TV, playing the son of John Leguizamo and Claire Forlani. Before that, he was cas ...