New England Patriots

"This isn't an ending. It's a starting line," Brady wrote. "Whatever you chase next we know you'll find success in."

Tom Brady’s oldest son, Jack Moynahan, graduated from Riverdale Country School in New York City this past week.

Brady saluted Jack with a heartfelt post on Instagram featuring family photos at the ceremony.

“One of the proudest days of my life, watching Jack walk across the stage and graduate into the next chapter of what’s already and impressive life,” Brady wrote. “You are an amazing son, brother, grandson, nephew, and friend amongst many other things.”

“What makes me happiest is knowing who you are when no one is watching. The way you show up for your friends. The was you check on people having a hard day. The love you give our family, and the fact that you still let me win 1v1 once in a while.”

Moynahan played varsity basketball at Riverdale Country School. He is listed as a 6-foot-6-inch, 170-pound small forward/shooting guard on his Hudl page.

Jack’s mother, actress Bridget Moynahan, also posted on Instagram about the graduation.

“So proud of our boy Jack,” she said. “We are all excited to see what you do next!”

Jack was born on August 22 2007, weeks before the Patriots kicked off the 2007 season.

Brady was named MVP and offensive player of the year that season, leading the Patriots to a 17-0 regular-season record and an appearance in the Super Bowl which they lost to the Giants.

“This isn’t an ending. It’s a starting line,” Brady said. “Whatever you chase next we know you’ll find success in. Take the risks. Be kind. Be yourself and know your family and friends are always right behind you cheering the loudest because you do the same for everybody else! We love you.”