From Wikipedia, the free encyclopedia. Matthew Ray Prokop (born July 29, 1990)[1] is an American former actor. He is known for his roles as Jimmie "The Rocket Man" Zara in the Disney film High School Musical 3: Senior Year (2008) and Josh Rosen in the Disney Channel Original Movie Geek Charming (2011). In 2011, Prokop was represented by Management 360 and APA. His first acting job was a brief appearance on Hannah Montana in 2007, followed by a walk-on role on The Office. He guest starred on Medium (2009) before landing a role in Furry Vengeance (2010) as Brendan Fraser's son. He featured in the 2011 Disney Channel Original Movie Geek Charming, based on author Robin Palmer's novel. In 2012, he appeared in an episode of Modern Family, opposite then girlfriend and series regular Sarah Hyland. His last acting appearance was in the 2013 film April Apocalypse, with his last three film roles being in films starring Hyland. Prokop dated his Geek Charming co-star Sarah Hyland for several years until August 2014, when she left him and filed a temporary restraining order against him for physically and verbally abusing her throughout their four-year relationship. In October 2014, a permanent restraining order was granted, and Prokop has not worked in the entertainment industry since. On May 18, 2024, Prokop was arrested for alleged aggravated assault against his girlfriend following a public incident and for resisting arrest. Per the police, Prokop’s partner said he had shoved her and slammed her head into something. The officers on scene reportedly saw enough evidence of injury to arrest the High School Musical 3 star. Prokop, 33, was booked into Victoria County Jail on charges of aggravated assault with a weapon and resisting arrest. On January 9, 2026, Prokop was arrested again–this time for alleged possession of child pornography, resisting arrest and bond violation. He is currently held without bond.