Charlie Sheen will tie the knot for the knot for the third time -- and this time, he'll be walking down the aisle with porn star girlfriend Brett Rossi.

The former 'Two and a Half Men' actor popped the question on Saturday (Feb. 15) while on vacation in Hawaii. The eccentric actor, who was previously married to Donna Peele, Denise Richards and Brooke Mueller, certainly made the most of their tropical Valentine's Day weekend, pulling out all the stops for the proposal.

Rossi, who confirmed the engagement to E!, spilled all of the romantic details:

"He even was a gentleman and got down on one knee. I was not expecting it at all. We had a beautiful Valentine's Day and he proposed to me early this morning after we watched the sun rise," she gushed. "The ring is classic and beautiful, but I don't have any photos to share just yet. This is the happiest moment of both our lives. He's my best friend and my soulmate."

The day before, Rossi tweeted her love for her Valentine and shared a shot of the two together:

Sheen and Rossi's romance was confirmed in November 2013 after they were photographed kissing on the balcony of their hotel in Mexico. She is far from the first adult film actress to date Sheen; in 2011, the actor was even living with both porn star Rachel Oberlin and model Natalie Kenly, whom he called his "goddesses."