Sarah Hyland and Matt Prokop
David M. Benett/Getty
08/26/2014 AT 01:15 PM EDT
star Sarah Hyland
has called it quits with her boyfriend of five years, Matt Prokop, her rep confirms to PEOPLE.
First meeting during an audition for High School Musical
in 2008, the duo – she is currently 23, he is 24 – then starred together in Disney Channel's Original Movie Geek Charming
underwent a kidney transplant surgery in 2012 as a result of her lifelong battle with kidney dysplasia, the actress told Seventeen
magazine it was Prokop who stood by her side
"He helps me with my medication and takes me to doctor appointments and all the stuff that I need to do to take care of myself," Hyland said. "Any other 21-year-old guy would not be there, I guarantee it. I am one of the luckiest people in the world to have him be there for me."
While the split may still be fresh, Hyland showed no signs of sadness while celebrating Modern Family
's outstanding comedy series win after Monday night's Emmy Awards
"Big glass of wine and a tall glass of Colombian," she Tweeted
along with a pic of costar Sofia Vergara
Reporting by MELODY CHIU