Erik Per Sullivan made his television network debut as the youngest son, Dewey, on Malcolm in the Middle. Fluent in both English and Swedish, Sullivan appeared as Richard Gere and Diane Lane's son in the feature film Unfaithful. He also has appeared in The Adventures of Joe Dirt, Wendigo, Armageddon and as "Fuzzy" in the Academy Award®-nominated film The Cider House Rules.

Sullivan, a yo-yo whiz, is an honor student and holds a first-degree black belt in Tae Kwan Do. He has over a dozen trophies and medals from Tae Kwan Do tournaments. He is an avid reader and has a huge interest in all literature relating to World War II. Sullivan's extracurricular activities include snow skiing, soccer, boogie boarding and paint ball. He also is a volunteer with the American Stroke Association in support of his father, who suffered two strokes in 2003.
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