American actress Reese Witherspoon shares a warm message for her son on his birthday

The Academy award-winning actor shared the sweet tribute on Instagram.

Alongside a picture, in which she poses with her "creative, kind, talented boy", the proud mama wrote, "Happy Birthday to my wonderful, creative, kind, talented boy @deaconphillippe! Every day you teach me something new about beats, Fort Nite dances, fantasy football and cool sneakers."

"What a gift to be your mom. I love you, buddy! (P.S. When did you get so tall!?) #Thisis15," the actor added.

The `Big Little Lies` star shares Deacon and daughter Ava Elizabeth, 18 with ex-husband Ryan Phillippe. She is also mother to Tennessee James with husband Jim Toth.

On the occasion of her "sweet little boy" Tennessee`s sixth birthday last month, Witherspoon had also shared an endearing wish on social media."Heyyyy!! It`s this little guy`s 6th birthday!

Happy birthday to my sweet little boy, Tennessee! He makes me smile & laugh and remember the important things in life everyday! #6," she wrote along with a picture of James.