Sarah Hyland’s Modern Family character Haley Dunphy has a definite on-again, off-again history with boyfriend Dylan “D-Money” Homes (Reid Ewing). However, the 23-year-old’s personal life couldn’t be more different from Haley’s. Sarah’s been in a steady relationship with High School Musical 3 star Matt Prokop for what seems like forever to us.

Just how long exactly have these love birds been a twosome? Wetpaint Entertainment posed that very question to Viggle LIVE! users during the latest episode of Modern Family. Nearly 48 percent of users guessed Sarah and Matt had been steady for two years, while 17 percent thought it was a much shorter period of six months.

However, the correct answer, as selected by 35 percent of super-smart Viggle users, is more than four years. Despite her young age, Sarah is a one-man woman who loves to be in a committed relationship. She and Matt met while auditioning for High School Musical 3: Senior Year and have been inseparable ever since.

Though Sarah wasn’t cast in the popular Disney franchise sequel along with Matt, the young actors have been co-stars a few times. They were romantic leads together in the Disney TV movie Geek Charming in 2011, and Matt even appeared in the Season 3 finale of Modern Family.

Do you want to test your TV knowledge? Not only is it easy, but you also get rewarded just for watching your favorite shows! All you have to do is download the Viggle app, get watching, and check into Viggle LIVE!