Justin Bartha: Engaged to Lia Smith!

Justin Bartha and his girlfriend Lia Smith are engaged, according to Us Weekly.

The 34-year-old Hangover actor proposed to the fitness trainer in early May while they were vacationing at Post Ranch Inn in Big Sur, Calif., a source told the mag.

PHOTOS: Check out the latest pics of Justin Bartha

“They’re the cutest couple. She was completely surprised by the whole thing,” the source shared. “The trip to Big Sur, the engagement, the ring, everything. So cute.”

Justin and Lia were first spotted together in the beginning of this year while spending time together in Hawaii.

Congrats to the happy couple!