Reese Witherspoon and Ryan Phillippe shared a birthday tribute for their son Deacon Phillippe on Instagram.

Deacon celebrated his 18th birthday on Saturday. Ryan posted a photo of the three together on his Instagram page to celebrate the occasion.

“Happy 18th birthday to our gorgeous, smart, talented, and caring son,” he wrote. “You are a true light in this world and are so loved by all who know you. We are lucky to be your mom and dad. Love you, pup..(I’d say we did pretty good @reesewitherspoon).”

Witherspoon also shared her own tribute post on her Instagram page.

“How did this happen?!! @deaconphillippe is 18?!! One day he was trading Pokémon cards, singing Bruno Mars songs, and playing American Ninja Warrior in the backyard. The next day, he is taller than me, cooking the family steaks on the grill and making his own music with his best friends,” she wrote. “My heart is bursting with pride about the young man he is becoming. Happy 18th Birthday Deacon! I love you to the moon around the sun and all the stars.”

Witherspoon and Ryan were married for six years before getting divorced in 2006. They also share a daughter, Ava Phillippe.

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