Benji Madden is in proud husband mode. In a sweet Instagram post Friday (Jan. 17), the Good Charlotte guitarist praised Cameron Diaz on her return to acting in new film Back in Action, as well as marked their 10-year wedding anniversary.

The Good Charlotte guitarist and the actress have famously kept their relationship private since they began dating in 2014 and married less than a year later.

Cameron Diaz’s husband Benji Madden celebrated a major milestone for the duo after the actress made her first film appearance in over 10 years with Back in Action.

In honor of 10 years of marriage earlier this month, Benji Madden shared a rare selfie photo Jan. 17 with wife Diaz, gushing over his "queen" in the caption.

Cameron Diaz is back on screen after an 8-year hiatus with Back in Action. Her husband, Benji Madden, celebrated her return with a heartfelt Instagram post, calling her "my queen." He praised her for being an incredible wife,

Cameron Diaz is making a well-deserved comeback after retiring from acting back in 2014. Not only did she star in Netflix’s latest action film, but she also celebrated a major milestone with her husband,