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"Everyone thinks it's wild but are so happy for them," a source told Us Weekly of the news. "Benji always tends to fall in love easily, but this time it's for real and he landed a great girl. They obviously both make each other incredibly happy and there's nothing better than that."
Rumors of their engagement were all but confirmed last month, but apparently, they're ready to take it out in the public! Though they've only been dating since May, the couple quickly moved into serious territory, with Diaz spotted wearing what many assumed to be an engagement ring in October. But according to sources, the quick pace suits Good Charlotte rocker Madden just fine.
"He is more traditional then her," a pal told Us of the couple, who were set up by Madden's brother Joel (who's married to Nicole Richie, one of Diaz's pals). "She really doesn't care about getting married but wants babies. He wants to get engaged and married first."
Sounds like his wish is finally coming true! Not only are Joel and Nicole thrilled, but Us reports that Diaz's mother, Billie, is also excited to get a new son-in-law. "Billie has been gushing about Cameron's new relationship," a source said. "She absolutely loves Benji and she hopes this is the man her daughter will finally settle down with."