Blake Lively has a sweet message for her hubby.

The former Gossip Girl star took to Instagram on Thursday to congratulate husband Ryan Reynolds on his newly minted Walk of Fame star, sharing a sweet family moment with daughter James.

"Proud is a pitiful word to describe how I felt today," she wrote. "The permanence of your impact is undeniable... Always has been, but now we have a fancy [star] to show for it."

WATCH: Ryan Reynolds and Blake Lively's Kids Make Their Public Debut at Dad's Hollywood Walk of Fame Ceremony 

In honor of the occasion, Reynolds and Lively's two young daughters officially made their public debut, posing for photo ops in front of the Hollywood and Highland complex on Hollywood Boulevard. James, 2, adorably cheered her dad on while he gave a speech, which included a sweet dedication to his wife.

"I want to thank my wife, Blake, who is sitting right there, who is everything to me," he said from the podium. "You are the best thing, the best thing that has ever happened to me, secondly to this star on the Hollywood Walk of Fame."

"You make everything better, I mean absolutely everything in my life better. You have given us two of the most incredible children I could ever hope to have," he continued. "You made me the father of my dreams when I thought I only had fun uncle potential, so thank you, I love you."

Speaking with ET moments later, the 40-year-old actor explained why it was so important to have his children by his side on that special day. 

"Normally we don't drop the whole family out like this, but I just thought I'd regret this in 20 years if I didn't have my kids here as well," he said. "So we all, we decided collectively to just come down here in one big movement and be a part of this."

See the interview below: