Attending Global's Make Some Noise event, the couple looked perfectly in sync as they both suited up for the showbiz bash.
While Professor Green looked very dapper in dark jeans and a blazer jacket, Millie oozed class in a chic two-piece suit and cool bralet - courtesy of her pal, Made In Chelsea's Rosie Fortescue.
Luckily for Mills, Rosie was on hand to help sort her red carpet look with one of her own designs from her collection with Lipstick Boutique.
Oh, the perks of having designers for your friends!
Taking a full-length snap of her outfit, Millie was clearly a fan of her BFF's latest collection. Alongside an Instagram selfie, Millie wrote: "Wearing my new suit tonight from @lipstick_uk @rosiefortescue I love it so much!!."
At the event, Millie and her hubby were joined by a whole host of celebs including X Factor's Union J, Marvin Humes, Spice Girl Emma Bunton and Ella Henderson.
Treated to a performance by Ella on the night, Millie couldn't resist grabbing a selfie with the young singer.
Clearly a fan of Ella and her music, Millie said: "Love seeing this girls journey! @official_ellahenderson you sounded amazing tonight #globalmakesomenoise."
Millie and Pro Green's stylish night out comes after the former Made In Chelsea star recently admitted she was keen to have children with her rapper beau.
Last month, Millie, 25, opened up on her plans to start a family, revealing she has set herself a time limit of five years.
"I want to be a young mum," she said. "I'd like to have kids by the time I am 30."
Millie confessed her baby plans shortly after celebrating her first wedding anniversary with Professor Green.
The pair tied the knot last September (2013) in a romantic ceremony at Babington House in Somerset.
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