The TV presenter welcomed her third child, a baby boy named Otto, with her husband Spencer Matthews on Easter Monday.
The couple are already parents to three-year-old Theodore and one-year-old Gigi.
And the tots were evidently delighted to meet their baby brother for the first time, as documented in Vogue’s latest video clip.
In the clip, Theodore can be seen gleefully striding into the sitting room to greet his mum and newborn sibling with a bouquet of tulips in his arms.
The toddler grins and joins the pair on the couch as a rendition of What Dreams Are Made Of from the Lizzie McGuire Movie plays over the montage.
“Is he nice, T?” proud dad Spencer beams.
“Why is he crying?” Theodore asks to which Vogue replies: “He’s only a baby!”
Next, Gigi gets to meet her baby brother and approaches him carefully.
Spencer asks her: “What do you think, Gigi? Should we keep him?” and she grins, simply saying Otto’s name as her parents cheer.
Her older brother Theodore then takes her hand and says: “Come here. Do you want to stroke his head?”
Captioning the heart-warming video, Vogue wrote: “T and Gigi finally meeting baby Otto! I’ve also officially joined Tik Tok.”
Friends and fans flocked to the comments section to gush over the sweet sibling bond, with model and TV presenter Glenda Gilson saying: “Awww so gorgeous.”
Influencer Grace Mongey was overwhelmed by the cuteness, writing: “Actually not able for this. so adorable”
One fan penned: “Theodore asking Gigi did she want to stroke his head and holding her hand, so cute!”
While another chimed in: “My emotions weren't ready for this.”
Spencer and Vogue recently opened up about how Theodore and Gigi are adjusting to life as a family of five, with former reality star Spencer saying: “We feel very fortunate and really blessed - we couldn't ask for better kids.
“It's always been our intention to have a big family and we are very lucky that we have been able to do that.”
Vogue added: “Otto slotted in straight away. The kids love him and we are obsessed with him. Theodore and Gigi love playing with each other and I think that Otto’s going to be another little member of their gang. It's really lovely to see.”