Harrison Ford and Calista Flockhart
03/21/2009 AT 06:00 PM EDT
Harrison Ford and girlfriend Calista Flockhart are engaged to be married, sources close to the couple confirm exclusively to PEOPLE.
Ford, 66, surprised Flockhart, 44, with an engagement ring on Valentine's Day weekend while the two were away on a family vacation with son Liam.
Reps for the couple did not return calls.
The couple has been together for seven and a half years. No wedding date has been set yet.