Joseph Leonard Gordon-Levitt (born February 17, 1981) is an American actor, known for roles both as a child and as an adult. His career has spanned more than 20 years, during which time he has worked in at least 24 feature films, as well as a number of television shows and theater productions.
Beginning in commercials as a young child, he went on to appear in a number of television films and series, including a lead role in a television revival of Dark Shadows and a film debut in 1992's Beethoven. An appearance in A River Runs Through It followed. He gained a lead role in the television sitcom 3rd Rock from the Sun as the young Tommy Solomon, had a strong supporting role in the 1999 film 10 Things I Hate About You and performed one of the lead roles in 500 Days of Summer.