Gisele Bündchen pens the sweetest message to Tom Brady's eldest son - and it's emotional

hellomagazine.com:

Gisele Bündchen took to Instagram to celebrate her young stepson's birthday, and what she said is so sweet!READ: Tom Brady takes unexpected break from NFL for 'personal' issues – detailsTaking to her Instagram page this week, which boasts up to 19.6 million followers, the stunning star posted a precious photo of her two young children, Benjamin, and Vivian, alongside their half-sibling Jack, the birthday boy.

WATCH: Gisele Bundchen is unrecognizable in this clip - and Tom Brady has the best reactionGisele, 42, captioned the photo: "Happy birthday sweetest Jack!!

15 looks great on you!" She continued: "I wish you all the most wonderful things in the world. You are so loved by all of us.

Te amo", followed by a heart emoji.MORE: Gisele wishes Tom Brady a happy birthday with heartfelt message and family photoREAD: Gisele stops fans in their tracks with striking new modeling photosFamous faces took to the comments to celebrate Jack's birthday, including Lindsay Lohan's mom Dina who wrote: "Happy birthday hunny… only love #familyfirst"Gisele's pro-athlete husband Tom Brady also took to Instagram to celebrate his sweet son's birthday.