The former Made in Chelsea star 'made it official' with now-husband Hugo at the Chelsea Old Town Hall before their lavish wedding which took place in July.
For their legal wedding, Millie opted for a chic cream wraparound top with 70s style bell sleeves, a pair of elegant cream linen trousers and a matching wide brimmed sun hat.
The bride carried a bouquet of pale pink and peach peonies and wore her hair in soft waves.
Groom Hugo looked equally stylish in a beige linen suit, which he kept all the more casual with an open-collared pastel blue shirt.
The fashionista's sophisticated sartorial choice echoes that of fellow model and newlywed Emily Ratajkowski, who surprised fans when she tied the knot with boyfriend Sebastian Bear-McClard in February this year wearing €125 mustard suit from Zara.
It was an altogether more formal affair for the couple's big day in July however, where Millie stunned in a strapless lace Kate Halfpenny gown which featured detachable, billowing sleeves.