Matt and Sarah reportedly met on the set of "High School Musical 3", as one of Matt's earlier tweets on his Twitter account around the time they were dating states that his world changed when he met someone in Salt Lake City, where the movie was shot.
In 2009, Hyland began dating actor Matt Prokop. Hyland and Prokop were living together, but ended their relationship amicably in August 2014. They also co-starred together as the lead roles in Geek Charming, a Disney Channel Original Movie.
August 26, 2014
Sarah Hyland has called it quits with her boyfriend of five years, Matt Prokop, her rep confirms to PEOPLE.
Where/How First Met
an audition for High School 3 Musical in 2008
Couple Profile Source