The celebrity chef revealed his son's moniker via Instagram on Wednesday.
Jamie Oliver can't stop gushing over his newborn son -- and we can't blame him!
The 41-year-old celebrity chef and his wife, Jools, welcomed their fifth child earlier this month, and on Wednesday, Jamie took to Instagram to finally reveal the precious baby's name.
WATCH: 9 Celebrity Babies Due in 2016
"Wow what a Hot Day today guys ? so the littlest one is stared out and sleeping again," he wrote. "It's probably polite to formally introduce the new boy to you, his names River Rocket Oliver."
"We think it suits him and he's a little gift and we are all very happy," he added. "Thanks for all your kind wishes big love jamie and gang."
Jools also shared a pic of a colorful sign that reads, 'Dream Big River,' simply captioning it with a rocket and heart emoji.
River Rocket isn't the only quirky name in the family -- Jamie and Jools are known for giving their children adorably unique monikers. Their little bundle of joy has three older sisters -- Petal Blossom Rainbow, 7, Daisy Boo Pamela, 13, and Poppy Honey Rosie, 14 -- and one brother, Buddy Bear Maurice, 5.
RELATED: The 16 Most Original Celebrity Baby Names of 2015
It doesn't get much cuter than that!
The couple announced they were expecting again back in March, just a few hours before Jools flaunted her burgeoning baby bump while walking the red carpet with Jamie at the London premiere of Eddie the Eagle.
"I thought we'd have a couple of kids but that's about it," The Naked Chef star told The Daily Mirror on the red carpet. "Basically, I do what I'm told, but [Jools] is an amazing family maker and I just go with it."
WATCH: Blac Chyna Reveals Her Pregnancy Weight Gain and Post-Baby Goals