Cameron Diaz got a very special message from her husband Benji Madden for her 44th birthday.

The 37-year-old musician, who rose to prominence as the guitarist of the pop punk band Good Charlotte, took to Instagram on Tuesday, Aug. 30, to greet the actress a happy birthday and declare how fortunate he is to be her husband.

“Happy Birthday to my beautiful Wife,” Madden wrote along with a photo of himself with the “Shrek” voice actress at Los Angeles County Museum of Art’s rain room. “You’re my best friend and I’m so thankful for you, sometimes I just want to tell the world. Generous, Kind, Compassionate, Selfless, Humble, Thoughtful, Patient and Loyal. Just a few of the qualities I would use to describe who you are, consistently, everyday.”

“Thanks for being you, I’m a lucky guy,”  Madden continued in his emoji-filled post. “Here’s to many more. I love you @camerondiaz.”

After seven months of dating, multiple sources confirmed to Us Weekly in December 2014 that Diaz and Madden got engaged. The couple’s rep then told People that the two tied the knot in an intimate ceremony at her Beverly Hills home in January 2015.

Reese Witherspoon, Gwyneth Paltrow, Samantha Ronson and Robin Antin all attended the couple’s nuptials. Joel Madden (Benji's twin brother) and Nicole Richie’s son, Sparrow, served as the ring bearer, while Richie, Drew Barrymore, Diaz’s sister Chimene and assistant Jesse Lutz served as bridesmaids.

It’s unclear whether the couple is planning to have children in the future, as the two seemingly had opposing points of view when it comes to starting a family.

In the November 2014 issue of Marie Claire, Diaz said that she’s not someone who feels like she has to do something because that's what society dictates.

“If a family happens, then it happens,” the Golden Globe-nominated actress told the magazine. “If children come to me, then I would do that, but I'm not someone who feels like she has to do something because it's expected.”

Madden, on the other hand, told Details magazine in September 2014 that the thought of settling down and starting a family had become more appealing to him. “It’s what every man wants, whether they admit it or not,” he said (via News Corp Australia) at the time.

Cameron Diaz Benji Madden took to Instagram on Tuesday — Cameron Diaz’s birthday — to express how lucky he is to be the actress’ husband. Pictured: Diaz arrives for a luncheon in celebration of the Hollywood Costume exhibition, at the Wilshire May Company Building, the future site of the Academy Museum Of Motion Pictures in Los Angeles, Oct. 8, 2014 Photo: Getty Images/AFP/Robyn Beck