Anderson Cooper Shares Adorable Video of 'Sweet and Strong' Son Sebastian on First Birthday

Photo: Anderson Cooper/instagram, Randy Brooke/Getty

The CNN journalist, 55, shared an adorable video of his sonSebastian LukeonInstagramThursday, honoring his little one as he celebrated his first birthday.

In the cute clip, Sebastian intently listens to a music box that plays “It’s a Small World,” which Cooper noted is an “old music box that belonged to my mom.”

“Sebastian just celebrated his 1st birthday!” Cooper wrote alongside the clip. “Sebastian is sweet and strong and smart and loves his big brother Wyatt a lot. They fill my heart with joy and love in a way i never imagined possible. Happy Birthday Sebastian!”

Along with Sebastian, Cooper is dad to 2-year-old sonWyatt Morgan.

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

Earlier this week, Cooper’s close friendKelly Ripasent Sebastian asweet birthday messageon Instagram.

“Joyeux anniversaireSebastian 🎈,” theLive with Kelly and Ryanco-host wrote in French in the photo caption.

“I love you 🎂 (that was a fast year@andersoncooper@benjaminmaisani),” she added.

Cooperannounced Sebastian’s birthlast February during an episode ofAnderson Cooper 360°.

“This is Sebastian Luke Maisani-Cooper. He was 6.8 lbs. at birth and he was healthy and happy and even his occasional hiccups, are to me, adorable,” Cooper said. “He mostly just sleeps and eats and certainly poops, but he already seems like a wise and thoughtful little chap.”

source: people.com