Jamie and Jools Oliver's fans were in for a shock over the weekend as the mother-of-five shared the most gorgeous photo of her youngest son River.
Sharing the sweet snap, Jools wrote: "Hi little nugget."
MORE: Jamie Oliver delights fans with adorable new family photo of wife Jools and their kids
The four-year-old could be seen sitting on the stairs of his home with his eyes closed. The youngest of the Oliver clan looked adorable in a grey jumper with a sunflower on it. He wore matching yellow leggings, red socks and black trainers.
WATCH: Jools Oliver shares the most adorable video of River singing
And whilst some of Jools' fans were quick to comment on how adorable her son looked, with daughter Poppy writing: "Cute" and friend and author Zoe Clark-Coates adding "adorable", others were shocked by how much older he suddenly looked.
"He looks so old! Our boys are growing so much, so quickly," a fellow friend wrote, whilst another follower added: "Oh my gosh! He has grown so much!"
A third remarked: "Oh my goodness he looks so grown up!!! Gorgeous."
© Photo: InstagramRiver Oliver turned four years old in August
Jools' photo follows a gorgeous family snap shared by proud dad Jamie on Saturday.
The father-of-five titled the photo: "My clan," and in it, all five of his children could be seen sitting on the sofa with their mum Jools Oliver - and little River was even wearing an adorable bumblebee outfit!
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Jools has previously opened up about River's quirkiness before.
Talking to Zoe Hardman and Georgia Dayton on their Made By Mammas podcast in July, the 45-year-old designer revealed she was feeling nervous about River attending school in September.
© Photo: InstagramJamie Oliver shared the sweetest family picture over the weekend
Asked how she thought he would get on by Zoe, Jools revealed: "I don't know. He's a funny little boy. I don't know, I really don't know. He really loves girls, he doesn't really like boys, as in playing with boys, and he's going to an all-boys school which is a bit worrying."
She added: "And he loves dressing up, he wears a dress every day, I'm not revealing anything, I just think he is the most different… I've never met a child like him. So he is theatrical, interesting, totally like a little girl, and it's so funny because he and Buddy get on really well but Buddy is a real boy and he is like a little girl, but a boy so I don't know. I have no idea. I just hope they have Frozen dresses in the dress up box, in an all-boys school. He is just a character."
