Millie Bobby Brown, 22, is the ultimate cool mom in exotic string bikini collection

No stranger to a selfie, the first-time mum pouted her lips for a gym picture in a triangular-shaped string bikini top featuring black and white zebra stripes. 

She stood with her back to a mirror that reflected what appeared to be an outdoor gym in the tropics, kitted out with rowing machines. 

In the selfie, Millie flexed her toned abs and accessorised her swimwear with a coloured beaded necklace and a simple gold chain with an ‘M’ pendant hanging from it. She added gold hoop earrings and scraped her hair into a messy bun.

In another of the star’s social media uploads, Millie showed off a more colourful bikini top in the same triangular string style, this time in bright fuchsia and muted brown. 

The colours were meshed with one another in a kind of swirling pattern, and the actress added a pair of denim shorts to cover up her swimsuit’s bottom. 

She wore the same necklace combination but swapped the small hoops for large, thin silver hoop earrings and shielded her eyes with some black chrome sunglasses. 

While away on holiday, Millie posed up a storm in a very tiny black and red string thong bikini, featuring cherry lips and red detailing. 

She stood underneath a jungle of palm trees and had wet hair from swimming in the ocean as she let the sand engulf her bare feet. 

For a garden reading session, Millie opted for an all-white two-piece bikini and lay on a lounger with her own book, ‘Nineteen Steps’. 

Keeping it simple, the swimsuit featured a bandeau-style white top and high-leg white bottoms with tiny gold hoops keeping the material together. 

She pulled her brunette hair up into a top knot and added a pair of orange-tinted black-framed sunglasses. 

In another ocean-side snap, the actress lifted her face up to the sun in a paisley-patterned light blue triangle bikini top and matching bottoms.

This swimsuit featured long strings that tied the material together and hung down her sides. She wore her hair in an up-do and had on hoop earrings as well as one beaded necklace. 

Standing in a similar position to her ocean blue picture, Millie swapped out the strings for a more fitted, tiny red bikini that featured a triangle top and very high-waisted bottoms. 

She lifted a two-toned blue and white tie-dyed sarong above her head for the picture, and this time, sported bleach blonde hair that was styled into a bun. 

Embodying her natural surroundings, Millie was the image of a colourful island girl in her next bikini picture that showed off a balcony-style bikini top and high-waisted bottoms in an array of yellows, blues, turquoise, and pink. 

She added a beaded belt around her middle and tucked a small white flower behind her ear to finish off the tropical ensemble.