John Stamos Is 'On Cloud Nine' Over Engagement to Caitlin McHugh: She's 'the Perfect Girl' (Exclusive)

The newly engaged star opened up about his magical Disneyland proposal, and how he had to work at improving himself before he could pop the question.

John Stamos couldn't be happier over his engagement to "perfect" girlfriend Caitlyn McHugh.

The Fuller House star and his new fiancee turned out for a benefit dinner hosted by mothers2mothers and The Elizabeth Taylor AIDS Foundation at Ron Burkle’s Green Acres Estate in Beverly Hills, California, on Tuesday, where he spoke with ET about popping the question on Sunday.

"I didn’t even walk in. Did you see? I just floated from the car," Stamos said, beaming. "I’m on cloud nine. I’ve been waiting for the perfect girl for over a decade and she walked into my life."

The adorable couple walked the red carpet outside the event together, and were all smiles as they posed for photographers, even sharing a romantic kiss. McHugh also proudly showed off her stunning new sparkler.

Michael Tran/Getty Images

Stamos took to Instagram on Sunday to share the special engagement news, posting an illustration of him and McHugh standing in front of Disneyland's Sleeping Beauty Castle, as fireworks burst in the air.

"I asked...she said yes! ...And we lived happily ever after," Stamos captioned the pic, along with an engagement ring emoji.

The 54-year-old sitcom star told ET that he's "always loved family and wanted to have a family someday," but before he could find love and get married again, he needed to do some work on improving himself.

"A true, pure, beautiful person inside would have never gone for the old me a few years ago," Stamos said. "I had to get to the best me. Get back to the person I was, hit reset, and then I knew the right person would come along. Especially if I prayed and hoped and I knew my parents were up there watching. So I think they delivered an angel to me."

Stamos -- who was previously married to actress Rebecca Romijn from 1998-2005 -- began dating McHugh in early 2016, and they made their first public appearance together in July 2016, when they stepped out for a fun night at the 20th Century Fox party at San Diego Comic-Con.

"We're a perfect balance. I'm like, hyper and tense and she's like, 'It's cool man. Everything's fine,' Stamos said of his ladylove. "She's so calm and so graceful, which I'm not either of those things, so it's just a great balance. She's just a pure, authentic beauty. She's not trying to be something she isn't. She doesn't care about money or showbiz."

As for the star's picture-perfect Fantasyland proposal, the Scream Queens actor said he got some advice from Disney CEO Bob Iger himself.

"[Iger] happened to email me like a month or so ago, and it was like, the funniest email early in the morning, like, 'Hey, I follow you and Caitlin on Instagram and she's really a Disney geek, isn't she?'" Stamos recalled, referring to his fiancee's active involvement in Disneybounding -- a hobby among some Disney enthusiasts, who dress up in modern clothing ensembles influenced by specific Disney characters.

So, for the happiest moment of their relationship thus far, it only made sense to do it in the Happiest Place on Earth.

The actor used the opportunity to ask the studio head for some pointers on how to make the proposal even more romantic. 

"So he got involved, and then I got a Disney animator friend of mine, Paul Briggs, and he helped me cut together a little movie of all the most romantic moments [from] Disney/Pixar animation, and it was pretty special," the star explained.

From top to bottom, Stamos said he handled the entire proposal without McHugh knowing -- including picking out the engagement ring. And he certainly got something very special from famed jeweler Neil Lane.

"It's from 1945," he shared. "[It's an] old, vintage ring, and I just know her and [it] worked."

ET caught up with Stamos in March at the Kids' Choice Awards, and the smitten star revealed that his fellow Fuller House castmates actually prefer his ladylove to him.

"They all love her more than me. They're like, 'Is Caitlin coming?'" he joked to ET. "'We don't care about you, is Caitlin coming?'" Check out the video below to hear more about Stamos' adorable Disneyland proposal.

-- Reporting by Brendon Geoffrion

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