Jacob Smith is an American former actor. He began his career as a young child, making several guest appearances on popular TV shows before being cast as Owen Salinger on Party of Five, a role he held for two years. After the series' end, Smith went on to appear in Phantom of the Megaplex, a Disney Channel Original Movie, in 2000 and then in Cheaper by the Dozen and its sequel, Cheaper by the Dozen 2, in 2003 and 2005, respectively.