Julia Roberts Wishes 'Beautiful' Son Henry a Happy 17th Birthday with Adorable Throwback Baby Photo

"Incredible that this baby is now a towering 17 year old wonder," wrote Roberts in her tribute

Julia Roberts is the proud mom of a "beautiful" 17-year-old!

On Tuesday, June 18, the actress, 56, marked her son Henry's birthday by sharing an adorable photo of him as a baby on Instagram.

"Incredible that this baby is now a towering 17 year old wonder! Happy Birthday beautiful Henry 💙," wrote Roberts next to the photo that showed her smiling from ear to ear as she carried him in her arms.

Roberts shares the birthday boy with her husband Danny Moder. The two are also parents to twins Hazel and Phinnaeus, 19.

Related: All About Julia Roberts' 3 Kids — And Everything She's Said About Being a Mom

During an appearance on The Tonight Show with Jimmy Fallon in December, Roberts opened up about Henry being the only child left at their home after his two siblings headed off to college.

"I think it's a good 50/50 split. He's loving it. And I think he misses his people," said Roberts, noting that all of the three kids are doing "great."

The Oscar winner credits her early career success with allowing her to be with them as they accomplish new milestones.

Related: Celebrity Kids We Rarely See (Photos)

"By the time I had the success of my family life and had a husband and children who wanted to stay at home, I had been working for 18 years. And so I felt that I had the luxury. I didn't have to pick one or the other," she told British Vogue in January.

The ability to focus on her kids is something she called a "luxury."

"It was easy to pause work life to nurture my home life. And so, because I have girlfriends who were having to juggle being at work and having to go into the bathroom, and you know, get out that breast pump, I sort of went through that with them by proxy," she told the outlet. "To be allowed the luxury of staying home and being with my family, I had a deep gratitude for that time."

Last December, Roberts opened up to PEOPLE about a recent memory they made together.

Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human interest stories.

“I discovered a series with my kids, The Wonder Years, which I had never seen before. And boy, did we always look forward to cuddling up with that," she told PEOPLE.

For more People news, make sure to sign up for our newsletter!

Read the original article on People.