Sofia Vergara and Joe Manganiello reportedly got engaged while on vacation in Hawaii.

Vergara, who started dating Manganiello in July, was recently photographed rocking a gorgeous diamond ring, relaxing by the pool.

Although the attractive couple has yet to publicly announce their great news, E! first reported that the "True Blood" actor popped the question on Christmas Eve at sunset.

"I've never seen two people so truly in love," a source claimed. "The way they talk to each other, touch each other. It's incredible."

Another source revealed to PEOPLE that Manganiello had planned to propose during the island getaway and was "very nervous" to do so, because "he wasn't 100 percent sure she would say yes."

During the pair's romantic trip, the "Modern Family" star also took to her Instagram account on Sunday to wish her man a happy 38th birthday. "Happy happy bday to my love and best friend," she wrote the following caption with heart emojis. "to the one that makes me laugh like crazy!have a healthy wonderfull year babe!!! @joemanganiello."

Before actually dating the Colombian beauty, the "Magic Mike" star admitted that he'd had a crush on her since they met at the White House Correspondents' Dinner back in May -- when she was still with her ex-fiancé of two years, Nick Loeb.

"She's got the curves, she's got beautiful face, beautiful hair, just gorgeous," he told PEOPLE for July's Hottest Bachelors issue. "Naturally beautiful. She's feisty!"

Moreover, Manganiello on "On Air with Ryan Seacrest" three months later: "I had forgotten I had said that. And when the magazine came out, by that time, we were seeing each other and when I got the magazine and opened it up and read it, I forgot I said that. I started laughing."

As for Sofia Vergara's response to Joe Manganiello's admission? "She was laughing at me," he said. "She thought that I was crazy for having said that out loud or said it in the magazine, but you know, I guess it worked."