Source confirm to Us Weekly that the couple - who went public in July of 2011 - has split, as the Scream 4 star attended this weekend's Sundance Film Festival on her own.
"They're both young kids, they had crushes on each other but the relationship ran its course," an insider simply says. "She isn't and wasn't looking for a serious thing."
Another insider adds that the Glee star was "such a good boyfriend," which at least bodes well for his next relationship.
Overstreet has been linked in the past with Taylor Swift and Naya Rivera, while Roberts previously dated Alex Pettyfer. She's also the niece of Julia Roberts.
