Cameron Diaz and Benji Madden are "engaged" after a whirlwind seven month romance New bling ... Cameron Diaz showing off what appears to be a gold wedding band on Friday afternoon. DESPITE once declaring she was not the marrying type, movie star Cameron Diaz is engaged to rocker Benji Madden after a whirlwind seven month romance, according to a source. The Hollywood it couple have been dating since April and rumours of an engagement began to swirl last month when the 42-year-old actress was spotted wearing a sparkling diamond band on her finger. Star couple "engaged" ... Benji Madden has reportedly popped the question to Cameron Diaz. Now an entertainment industry source in Los Angeles close to Diaz's camp exclusively tells News Corp Australia that Madden, 35, definitely did put a ring on it in October. The There's Something About Mary star and her heavily inked rocker beau, one half of The Madden Brothers, are yet to publicly comment on their engagement. Loved up Diaz and Madden spotted leaving their holiday yacht in Beaulieu, south of France. STAR COUPLE: Romance between Cameron Diaz and Benji Madden heats up However the well-placed source said the pair had decided to take things to the next level and Madden popped the question with a diamond-encrusted ring. The inside confirmation comes after Diaz and Madden were spotted on a date at a 5 Seconds of Summer concert in LA at the weekend. The ring? ... Cameron Diaz sports a new diamond encrusted band on her ring finger, with an insider saying she's engaged to Benji Madden. Picture: WireImage Source: Supplied Australian radio presenter Angus O'Loughlin, who co-hosts the nightly Shazam Top 20 show on 2Day FM, was in the crowd with his co-host Ash London and spotted the loved up star couple. They were snapped cosying up together while the Sydney band performed to thousands of screaming fans. Date night ... Cameron Diaz and Benji Madden spotted in the crowd at the weekend's 5 Seconds of Summer concert in Los Angeles. Madden, who was a coach on The Voice Kids Australia with twin brother Joel earlier this year, started dating Diaz after they were introduced to each other by his sister-in-law, Nicole Richie. BLIND DATE: Nicole Richie on setting up Cameron and Benji In September, Madden told Details magazine that the thought of settling down and starting a family had become more appealing. "It's what every man wants, whether they admit it or not," he said. "The one" ... she once declared she wasn't the marrying type, but a romance with rocker Benji Madden seems to have changed Cameron Diaz's mind. The musician was previously engaged to Australian media identity Sophie Monk, until their split in 2008. SUPER AWKWARD: Kyle Sandilands" disastrous interview with Cameron Diaz Diaz was once quoted as saying marriage wasn't something she was "drawn to" and has had several long-term and high-profile relationships, including with pop star Justin Timberlake. Originally published as Cameron Diaz and Benji "engaged"