Cameron Diaz will marry Benji Madden in a surprise wedding tonight, according to new reports. The Annie actress has been dating the musician for eight months and has recently been wearing an engagement ring, although neither party has confirmed the news. According to the Daily Mail, the 42-year-old will tie the knot with the Good Charlotte rocker in California tonight after holding a rehearsal dinner in Beverly Hills on Sunday. A source told the website that Diaz initially bonded with Madden due to his taste in music but quickly fell for his "chivalrous" ways. "Cameron hasn't been this happy in a long time. She found someone who knew how lucky he was to have her. The other guys treated her badly, but Benji would do anything for her. She's madly in love." The actress had previously said that she felt timing was the key to the perfect relationship, as "you have to find someone in the same place as you are". "Timing is everything. If you get into a relationship where you want something the guy doesn't want, it's never going to work. You're never going to get him to be in that place. No matter how old you are, finding the guy who's in the same place as you are and wants to show up is the only way a relationship works, period."