The pyjamas were designed by Jools for Mothercare, but are usually only available for children aged five and under. So the kids' brand specially made larger versions for mum and dad and their two eldest daughters – Poppy is ten and Daisy is nine.
The couple's youngest daughter Petal Blossom Rainbow, three, also got her own pair but is wearing a bright purple party dress and crown in the family snap instead, because her pjs were in the wash.
Jamie posted the soft focus picture – which shows the Oliver clan in a bright toy room - in instragram. The caption read: "Haha the whole family in Jools PJ's ...I can't believe Mother Care actually made me a pair of her toddler Jim-Jams !! Very funny if not slightly strange. Although one little purple princes had hers in the wash & wasn't very happy bless her .......big love to all you guys #jamie x x. X x xx x x. Xx x. X xx x x x x."
Thirty-seven-year-old Jules designed the cute nightwear for Mothercare back in August, as part of her Little Bird collection. Her aims for the range were to create an "eclectic and affordable" collection of classic clothes, toys and bedding suitable for babies and children up to five years old.
During the launch, on the Mothercare website, Jools said about the jersey rainbow pyjamas – which cost between £12-£14 : "These are my absolute favourite! I love rainbows and stripes, wish they came in my size!"
The mother-of-four said that she chose the company because she wore Mothercare during her own childhood.
She said: "My mother dressed us in Mothercare clothes and I have done the same with my children, so Mothercare has always been part of my life. My designs combine both quirky and classic style inspired by my childhood memories. The collection features nostalgic, classic pieces, sprinkled with unique touches and playful attention to detail.
"The entire collection has been lovingly put together and accessibly priced for parents. I cannot wait to see the reaction to it."