Sofia Vergara appeared to be sporting a new diamond sparkler on her ring finger while vacationing with boyfriend Joe Manganiello, sparking engagement rumors.

Sofia Vergara, Joe Manganiello Engaged?

Poolside in Hawaii with Manganiello, Vergara was caught on camera rocking a large diamond ring. The bauble, which looks like it could be an engagement ring, appears clearly in multiple pictures obtained by the Daily Mail. The ring features a large, rectangular central stone surrounded by a ring of smaller diamonds.

Vergara, 42, and Manganiello have been spending the holidays in Hawaii, where they’ve also been celebrating Manganiello’s 38th birthday.

“Happy happy bday to my love and best friend,” Vergara captioned a loved-up picture with Manganiello on Instagram. “To the one that makes me laugh like crazy! have a healthy wonderfull year babe!!!”

A photo posted by Sofia Vergara (@sofiavergara) on Dec 12, 2014 at 9:51am PST

“Hawaiian bday!!” the Modern Family star captioned a picture of a cake and a stunning view of the ocean.

A photo posted by Sofia Vergara (@sofiavergara) on Dec 12, 2014 at 11:21am PST

Vergara and Manganiello have been publicly dating since July, two months after Vergara called off her engagement to Nick Loeb. Manganiello split with model Bridget Peters back in January 2014.