The ex-reality star was spotted at the premiere of new animation film The Reef 2: High Tide and was joined by her sister Giorgie and her son Ronnie, who looked very dapper in a tiny pair of beige dungarees and a matching cardigan.
Following in her nephew's smart footsteps, Billi also dressed up for the occasion in a trendy black and white printed jumpsuit, which featured a leather waistband.
She teamed her outfit with a pair of black wedge trainers and went all out with her make-up and hair, sweeping her brown locks into a well coiffed up 'do.
Meanwhile, Giorgie opted for a comfy and casual look and donned a grey jumpsuit that slightly resembled a onesie.
Billi - who was spotted out with Lauren Goodger last month - seemed proud as punch to be treating Ronnie to such a special day out and posted a snap of her sister and Ronnie after the film, along with the caption: "Ronnie at his first premier The Reef".
She added: "Ronnie loved it."
We can already guess who the tiny tot's favourite family member is after this private screening!
What do you think of Billi's outfit? Let us know below, as the best comment each week wins £50!