and Brian Austin Green have already seen their love last longer than most Hollywood marriages: A six-year courtship and a lengthy, four-year engagement (only briefly stalled for a few months last year) did little to cool their ardor for each other. When the Transformers
actress spoke to PEOPLE about her fiancé on June 17, it was as though she were still in the first, giddy stages of romance. "I'm more in love with him now than I was in the beginning," she said. "We're more committed to each other than we've [ever] been."
Especially now. On June 24 the pair quietly tied the knot in a romantic sunset ceremony on the beach in Hawaii, with only Green's 8-year-old son Kassius (with ex Vanessa Marcil) bearing witness to the nuptials. (They texted their parents the news that evening.) "They didn't need anything extravagant. Megan didn't want tons of flowers or diamonds," says a source close to the couple. "They just wanted it simple." As the Armani-clad bride, 24, walked barefoot down a sandy aisle to join Green, 37, on the beach at the Four Seasons in Ka'upulehu, it was clear they had accomplished that goal. "They were beyond happy, and they seemed so comfortable," says the friend. "They decided a long time ago that they belonged with each other."
A local kahuna-a Hawaiian priest-wed the couple at sunset, while Kassius, as best man, helped with the rings. Kassius was also given a special jade bracelet blessed with ocean water, and the three were symbolically joined together as a family.
"They were on a high," says a source close to the couple. "They let everything go and enjoyed the fact that they were getting married." While Green (below, with son Kassius) kept it casual in Emporio Armani, Fox stopped fretting about the 16-ft. train on her custom-made silk georgette Armani Privé gown (sketch below). "It was so big, she couldn't keep it off the ground, so she just let it go and ran through the sand to the altar," says the source. "She wasn't going to worry about the little things."
While Kassius returned home after two days, the newlyweds stayed on for a weeklong sojourn during which they swam with dolphins, relaxed on the beach-and got used to being Mr. and Mrs. "They both had this giddiness," says the source. "She kept looking at him in disbelief, like, 'I can't believe you're my husband!'"
"I like sharing my life with somebody," Green told PEOPLE in 2006. Now that he and Fox have swapped rings-a gold band for him and a simple, diamond-studded one for her-"there's nothing more they could ask for," says a friend. "Brian said it was absolutely perfect."