Erik Per Sullivan Net Worth

Erik Per Sullivan has an estimated net worth of $5 million, according to Celebrity Net Worth, Erik Per Sullivan net worth page (figures as of September 18, 2026).

Erik Per Sullivan is an American former actor who was born on July 12, 1991, in Worcester, Massachusetts. He is the only child of Ann, who was born in Sweden, and Fred Sullivan, who owned a Mexican restaurant called The Alamo. He speaks some Swedish, his family visits Sweden almost every year, and as a child he studied piano and saxophone and earned a first-degree black belt in Taekwondo. He attended Mount Saint Charles Academy in Rhode Island and Phillips Exeter Academy in New Hampshire.

He is best known for playing Dewey, Malcolm's younger brother, on the Fox sitcom Malcolm in the Middle from January 2000 to May 2006. He also starred in Christmas with the Kranks in 2004, played the title role in the independent film Mo in 2007 and voiced Sheldon the Seahorse in Finding Nemo. His last acting credit was the 2010 film Twelve. He began studying at the University of Southern California in 2009 and by 2026 was studying at Harvard University.

How Erik Per Sullivan made his money

Nearly all of his earnings trace back to Malcolm in the Middle. He appeared as Dewey across the sitcom's full run on Fox from 2000 to 2006, growing up on screen as the show became a long-running network comedy, and that series work is the main source of his earnings.

Film roles during and after the show added more income. He had a starring part in the holiday comedy Christmas with the Kranks, led the independent film Mo and played other characters in film and on television while still a teenager.

Voice work added a family film credit. He voiced Sheldon the Seahorse in the animated hit Finding Nemo and in its video game tie-in.

He has not acted since Twelve in 2010, when he was 18. He kept a low profile afterward and chose to focus on his education, so he declined to return for the revival Malcolm in the Middle: Life's Still Unfair. Co-star Jane Kaczmarek said in 2025 that he was studying Victorian literature. That means his finances rest on the work he did as a child and teen actor rather than on any new acting income.

His estimate

Celebrity Net Worth estimates Erik Per Sullivan's net worth at $5 million, on its page last updated September 18, 2026. That figure is an outside estimate of what the star has earned and kept after taxes, fees and spending. It is not an official number, and the star has not confirmed it or published personal finances.

His figure reflects his child acting career, led by six years on a hit network sitcom, before he stepped away to study. We will add any newer dated estimate from a named outlet to the chart above, and we never fill in the years between published figures.