Wilmer Valderrama is reportedly “ready to pop the question” to Demi Lovato.

The 33-year-old star of That ‘70s Show was spotted purchasing a ring at the Tiffany store in Pasadena, California.

And a store employee tells Celebuzz Wilmer exhibited classic proposal symptoms throughout his transaction.

“Yes, Wilmer did buy a ring here,” the shop attendant told the outlet.

“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.”

The purchase took place in November and it is unknown whether Demi has received the jewellery yet.

The pair are said to have reignited their on/off romance earlier this year and it is rumoured their undercover affair is filled with passion.

“They have been together for quite awhile,” a source revealed to the website.

“Demi is very good at keeping secrets. They are in love and nothing is going to change that.”

On her 21st birthday in August, Wilmer gushed over her via Twitter.

"I've been so proud of the strength & commitment you've gained 4 life, keep inspiring us all! Happy birthday my @ddlovato!" he shared with more than 394,000 followers on the micro-blogging website. "With & by u always."

Demi first began her relationship with Wilmer in 2010 when her romance with her Camp Rock co-star Joe Jonas ended.
Wilmer’s ex-girlfriends include Lindsay Lohan, Minka Kelly and Mandy Moore.