No Marriage Troubles Here! Cameron Diaz's Husband Benji Madden Proudly Promotes Actress' Book

Cameron Diaz and husband Benji Madden are proving again that the rumored marriage troubles are overblown as the couple's relationship appears to be getting stronger.

The "Sex Tape" actress just revealed the cover of her second publication, "The Longevity Book." It is a follow up on her "New York Times" bestseller, "The Body Book."

The "Charlie's Angels" star shared an Instagram photo showing the cover of her new book.

She wrote, "I am so excited I can barely contain myself!! As soon as I saw it myself, I wanted to share with you the cover of THE LONGEVITY BOOK. I am so proud of this book and very much looking forward to engaging us all in a new conversation about aging-how to do it with strength, grace, health and wisdom."

Cameron Diaz added, "I also wanted to thank you again for your beautiful submissions, which we'll eventually get to show you as part of the cover beyond the cover; a perfect representation of women standing beside other women, as a united front, to stage change and incite progress. I can't wait until hard copies hit the stands in April so we can really get started!! #thelongevitybook #theprivilegeoftime @thebodybook ox."

Meanwhile, Camero Diaz's husband Benji Madden couldn't help but gush about his wife amid rumors about their marriage troubles.

The former Good Charlotte guitarist shared on his own Instagram the book cover of wife Cameron Diaz's book.

"I Couldn't be more proud of my Bad Ass wife," he wrote. "She wakes up everyday 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!"

Cameron Diaz and husband Benji Madden started dating in late 2014 and got engaged seven months later. They tied the knot in a super secret ceremony in her Beverly Hills home on Jan. 5, 2015.

The rumors about their marriage troubles began almost immediately.