Tom Brady's Son Jack Is All Grown Up in Dad's 15th Birthday Photo: "Amazing Young Man"

Tom Brady's oldest son Jack turned 15 on Aug. 22, and his dad is very proud. Brady commemorated his son's special day with an affectionate Instagram post that read, "Happy Birthday my beautiful son. What a blessing you are in our life. We love you so much and are so proud of the amazing young man that you are. You make every day of our life more joyful and fun.❤️❤️ Have a great 15th Birthday Jack 🤗."

Brady, who announced that he is unretiring from the NFL and will spend another season with the Tampa Bay Buccaneers in March, opened up about his approach to parenting kids with immense privilege in July, saying that he's aware his children are growing up under unusual circumstances. Because of that, he said that he tries to keep the kids grounded no matter what. "I think we can try to create experiences that are more along the lines of what most kids go through, even though they will still have experiences that a lot of kids never do have," he said.

Brady shares Jack, whose full name is John Edward Thomas Moynahan, with ex-girlfriend Bridget Moynahan. He also has two children, Benjamin and Vivian Brady, with his wife, Gisele Bündchen. The couple frequently share their love for their kids — and each other — on social media. On Mother's Day, Brady posted a selfie with his wife and wrote, "Happy Mother's Day. . . thank you for always taking care of us. We love you so much." Previously, he opened up about how impressed he is with his wife's workouts and shared that Bündchen helped him accept the fact that his youngest son doesn't like sports like his quarterback dad.