Tom Brady is celebrating his 40th birthday today and his wife, model Gisele Bundchen, just shared a sweet photo of the two of them on her Instagram page.

She also posted a message to the New England Patriots quarterback.

"Over 10 years ago I fell in love with you because of your beautiful and sensitive heart," she wrote on August 3. "I love the sweetness in your essence. Today you are starting a big new chapter and I wish you so much happiness and fulfillment in all aspects of your life. Happy birthday my love! Making 40 feel like 20!!! You go @tombrady!!!!"

Brady and Bundchen began dating one another in December 2006 after Brady split from former girlfriend Bridget Moynahan, who was pregnant with his oldest son John, now 9, at the time. Then, on February 26, 2009, the couple tied the knot in Santa Monica, California.

Brady and Bundchen share two children, five-year-old son Benjamin Rein and four-year-old daughter Vivian Lake.

Weeks ago, while celebrating Bundchen's 37's birthday, Brady posted a photo of the model riding a horse on a beach.

"Happy Birthday @gisele this has been such a special year and we all love you more than you could ever know!" he said. "I love this picture because you are in your element...loving life, nature, and your family! We love you. Papai, Jack, Benny, and Vivi."

During an interview with Access Hollywood last year, Brady spoke of his marriage to Bundchen, admitting that they've gone through ups and downs.

"I'm blessed to find this life partner that we all kind of seek at different times in our life," he shared, according to a report by Us Weekly. "We found each other at the right time. We've been through a lot of ups and downs together, and in so many ways, that's kind of built our relationship so strong."

"We all have our challenges that we face in our life," Brady added. "And it's great to have that rock that you can always lean on that can support you in different ways that you need to."