- Besides acting, Erik is musically gifted – he plays both the piano and alto saxophone.
- Born to a Swedish mother and an Irish-American father, Erik is fluent in both English and Swedish, often visiting Sweden with his family.
- He is best known as Dewey from Malcolm in the Middle, where he appeared in 151 episodes and became a beloved TV personality.
- After a successful start in films and television – including a breakthrough role in The Cider House Rules – he retired from acting in 2010 at the age of 18, choosing to focus on his education and personal interests.
- He trained in Tae Kwon Do and holds a black belt.

Erik Per Sullivan Trivia
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