William Robert "Rob" Pinkston IV (born January 30, 1988) is an American actor who appeared during the fourth season of MTV's hidden camera practical joke television series, Punk'd. He also played "Coconut Head" on Nickelodeon's Ned's Declassified School Survival Guide. Although their last names are the same, he is not related to Ryan Pinkston, another Punk'd alumnus, though the two are said to be friends. He attended William S. Hart High School, in Santa Clarita, California a city located north of Los Angeles. He was in Extreme Movie with Ryan Pinkston and Frankie Muniz.