Benji Madden Wishes 'Beautiful Wife' Cameron Diaz a Happy Birthday -- See the Sweet Pic!

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Cameron Diaz and Benji Madden
Instagram

Benji Madden is pretty smitten with his wife, Cameron Diaz.

In celebration of the actress' 45th birthday on Wednesday, the Good Charlotte rocker shared a sweet message on Instagram, along with an adorable photo. 

"Happy Birthday to my Beautiful Wife. I feel like I am the LUCKIEST guy ALIVE," Madden captioned a photo of himself and Diaz snuggled up to one another on a boat. "I don't think anyone could ever know the Depth, Kindness, and Compassion that I get to experience everyday thanks to My One and Only."

The 38-year-old musician continued to gush over his wife of two years, writing: "You got me til the end, baby."

PHOTOS: Cameron Diaz and Benji Madden Enjoy a PDA-Filled Lunch Date

Diaz is clearly as crazy about her hubby! While she rarely speaks about her personal life, she couldn't help but praise Madden after a Good Charlotte show last summer.

One of my favorite things about being married, is how much pride I take in my husband @benjaminmadden... He makes me proud everyday.. One day it might be how generous and giving, another how gentle and thoughtful. Or when he is fiercely protective of the people he loves and cares about... And everyday single day I am so incredibly proud of his integrity as a human being.. But TODAY what I'm most proud of is his talent... his gift.... Today his band @goodcharlotteband released their first album in 6 years #YouthAuthority .. What makes me even more proud is that he has released it on his own independent label MDDN... And it is so damn GOOOOOOOOD... Its so full of love and hope and truth... about forging and holding onto love... I wish that everyone could write music to express their pain.. their fears... their hopes and dreams. Baby you amaze me... CONGRATS!! @goodcharloteband @mddnco #youthauthority #proud http://apple.co/YouthAuthority

A post shared by Cameron Diaz (@camerondiaz) on

"One of my favorite things about being married, is how much pride I take in my husband @benjaminmadden," she wrote. "He makes me proud everyday.. One day it might be how generous and giving, another how gentle and thoughtful. Or when he is fiercely protective of the people he loves and cares about... And single day I am so incredibly proud of his integrity as a human being."

WATCH: Cameron Diaz Talks 'Surprise' Marriage to Benji Madden -- 'I Didn't Think It Was Something I'd Do'

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