Benji Madden Congratulates "Beautiful & Fearless" Wife Cameron Diaz on Her New Book

Cameron Diaz’s latest venture, The Longevity Book, hits stores today, and she isn’t the only one who’s excited. Her hubby, Benji Madden, shared the cutest message to his beautiful and fearless wife to congratulate her on the launch.

“Today is the day! The LONGEVITY BOOK is out! My Beautiful&Fearless Wife @camerondiaz set out to encourage women, and all of us to invite a new conversation about aging, and the privilege of time,” he wrote. “I’m so proud. My best friend, my heart, and the most bad ass chick I know.”

Diaz embraces her natural beauty with a stunning fresh-faced photo on the book’s cover. The 43-year-old hopes to teach women the truth about aging and “how to do it with strength, grace, health, and wisdom,” she wrote on Instagram.

The Longevity Book ($17; amazon.com) hits bookshelves today.