Pop star Robbie Williams and actress Ayda Field are now a married couple. The pair,who met in 2006,exchanged vows Saturday in front of about 75 friends and family members at his Beverly Hills home,reported People magazine. "The ceremony was very beautiful and romantic," said a source. The 31-year-old bride wore a white dress with her hair pinned up while Williams,36,wore a black tuxedo. "At last,Rob is happy. That's what you want for your kids and this is the happiest I've seen him. Ayda is so beautiful and so delightful and so lovely and just so right for him. They are brilliant together," said the singer's father Pete Conway. After the 30-minute ceremony,guests enjoyed a sunset cocktail reception with champagne and gourmet hors d'oeuvre. The couple will continue their celebration with sit-down dinner and dancing. The Millennium singer has reportedly signed a pre-nuptial agreement with Field in order to protect his 80 million pounds fortune.