"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'

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

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.