updated 08/27/2014 AT 12:35 PM ET
•originally published 08/27/2014 AT 12:45 PM ET
Johnny Galecki and Kelli Garner have called it quits after more than two years together, a source confirms to PEOPLE.
The breakup of The Big Bang Theory star and former Pan Am actress, who first stepped out together publicly in early 2012, comes just months after a romantic vacation in Mexico. The duo also attended the nuptials of Galecki’s ex and Big Bang costar Kaley Cuoco, who married tennis player Ryan Sweeting in Santa Susana, California, on New Year’s Eve.
Reps for Galecki, 39, and Garner, 30, have not commented on the split.
The news also comes on the heels of a very big month for the actor, who signed a new, three-year deal that will pay him – along with Cuoco and Emmy winner Jim Parsons – the same $1 million-per-episode salary given to the cast of Friends in its final season.
Reporting by JULIE JORDAN