The rocker took to Instagram on Friday, where he gushed about his wife Cameron Diaz and all of the work she's done for her new book, "Longevity."
"I Couldn't be more proud of my Bad Ass wife," he posted with a cover shot of Diaz's new book (below). “She wakes up everyday [sic] on a mission to try and make the world a better place. I'm always amazed by the courage, strength and vulnerability she shows, relentlessly encouraging other women to love themselves. It has been amazing to get to watch her journey with her New book!"
"#theLongevityBook #April5th @thebodybook@camerondiaz #lovemywife," he added.
The cute couple – who initially met through Joel Madden's wife, Nicole Richie -- said "I do" in Beverly Hills last January and have been together since 2014.
The 36-year-old has had no problem showing off his love for the 43-year-old actress either. Madden also penned a sweet message for Cameron's birthday in August.
"Happy Birthday to my Beautiful Wife. My best friend and Everything else - there's so much I could write,” he shared on Instagram. “I'm the luckiest guy alive - I get to spend the rest of my life right here. I love this Woman!! Many more Baby!!"
We love that Benji is so supportive of his wife's career! What do you think about his sweet message? Sound off below and check out the gallery above to see more of Hollywood's hottest couples!