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.

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.

"Every year only gets more fulfilling," the musician wrote on Instagram, celebrating both a decade of marriage with Diaz and her new movie 'Back in Action'

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.

Benji Madden shared a tribute for wife Cameron Diaz celebrating their 10th wedding anniversary and the actress' return to the big screen.

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.

Benji Madden celebrated his and Cameron Diaz’s tenth wedding anniversary by sharing a slideshow of photos, including a rare couple selfie. See the post here.

Benji Madden celebrated his and Cameron Diaz's 10-year wedding anniversary, as well as his wife's return to acting, with a rare couple photo on Instagram.

Benji Madden celebrated his 10th wedding anniversary with his wife, actress Cameron Diaz, with a sweet post on Instagram.

Benji Madden has plenty of reasons to celebrate his wife, Cameron Diaz, including the couple’s 10th wedding anniversary and her return to acting. “This is my QUEEN. I celebrate this BAD ASS WOMAN. Wife,