It's an especially sweet photo given the ups and downs with Billy's health in 2017. Last month, Kimmel took a leave from his late night show to be with his son as he underwent his second heart surgery. Billy's first open-heart surgery took place when he was just three days old.
In the months since Billy was born, Kimmel has been very outspoken about his son's health problems. In May, he shared the news of his youngest child's open heart surgery with Jimmy Kimmel Live! viewers, later telling ET that having to share the news with the public "wasn't great."
"It's one of those things that happens and it's terrible and then you realize, 'Oh, I have to say something about that. There's parents who have to deal with a lot worse than we're dealing with, so we're keeping it in perspective," he said.
Kimmel's family is certainly not the only ones counting their blessings this New Year's.
Victoria Beckham also shared a photo of her family of six -- husband David Beckham and their four children, Brooklyn, Romeo, Cruz and Harper. The Beckhams rang in 2018 in Miami, Florida.
"Happy New Year!! X We love u all!! X kisses from us all!! X @davidbeckham @brooklynbeckham @romeobeckham @cruzbeckham #Harper x ✨," the 43-year-old fashion designer wrote.