It looks like Demi may have just given Wilmer the best birthday gift ever — saying yes to his engagement! While in Austin, Texas with Wilmer, she posted a pic holding a cup of coffee, and was wearing a ring on her left hand!

Demi Lovato and Wilmer Valderrama could be saying their “I do’s!” On Jan. 29, the day that the X Factor judge visited her beau on set of his new TV show, From Dusk Till Dawn, she posted a pic and said that she had never been happier!

Demi & Wilmer Engaged?

In the photo posted, Demi shows off her hot pink hair and looks super cute all bundled up. In her left hand is a coffee cup and we can’t help to notice that she has a gold ring on her ring finger!

This comes on the heels of OK! magazine‘s report that she recently told him to stop partying if they were hoping for a future — and he did.

Plus, HollywoodLife.com exclusively learned from the saleswoman at Tiffany & Co. that Wilmer bought a ring right before Thanksgiving and was “really excited and happy.”

“He chose a really classic, beautiful ring,” the employee told us. “Demi is going to be a happy girl when she gets it. He didn’t say what it was for but he was really excited and happy — he seemed like any other guy getting ready to pop the question.”

HollywoodLife.com has reached out to Wilmer and Demi’s reps for comment.

Do YOU think they’re engaged, HollywoodLifers? Let us know!

— Emily Longeretta

More Demi & Wilmer News:

1. Wilmer Valderrama Planning To Purpose To Demi Lovato — Report
2. Demi Lovato & Wilmer Valderrama Have ‘Talked About Marriage’
3. Wilmer Valderrama Bought Demi Lovato ‘Classic’ Ring — Proposing?