Wilmer Valderrama reportedly popped the question to Demi Lovato and his leading lady said yes, as evidenced by the diamond ring she'd flaunted in their recent trip to Austin, Texas. 

Demi Lovato and Wilmer Valderrama have been going out for sometime, but now, speculation says that Lovato is engaged to Valderrama.

The proof, according to a report from Hollywood Life, is the ring worn on her left hand while the two were in Austin, Texas.

The ring was seen in a photo posted by Lovato here, which also shows off her new pink hair color.

Previously, Lovato issued an ultimatum to Valderrama to mend his partying ways if he expects to have a future with her. According to the same report from the Hollywood Life, the former "That '70s show" star did just that.

In another report, PerezHilton.com confirms that an engagement is happening, as an employee at Tiffany & Co relayed to the media outlet that Valderrama had bought a ring right before Thanksgiving.

"We all talked about it afterwards because he was so darn nice! He chose a really classic, beautiful ring. 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."

However, this engagement rumor has been denied through a report on Entertainmentwise. According to the site, a source close to the "X-Factor" judge said the ring on her finger is "not an engagement ring."

Lovato has had an on and off relationship with Valderrama for a number of years. The 21-year-old former Disney star and the 33-year-old "Handy Manny" voice have neither confirmed nor denied their relationship.

But photos belly that fact, as she visited him on the set of Robert Rodriguez's TV series "From Dusk Til Dawn: The Series." As shown in this report, she was all smiles as she took pictures with a fan right on the set.