Malcolm in the Middle star Erik Per Sullivan, who famously played Dewey on the hit sitcom, has been spotted for the first time since 2007 in exclusive photos from The US Sun.

Erik Per Sullivan has kept his personal life private since retiring from acting - however, he was recently spotted in public for the first time in 18 years. On Wednesday, March 26, Per Sullivan, 33, who played Dewey on Malcolm in the Middle from 2000 to 2006,