We're not used to seeing the reality star in a suit, but he certainly dressed to impress in a grey tailored three-piece, as he attended Specsavers' Spectacle Wearer of the Year event held at the Royal Opera House.
Proudlock, who came arm-in-arm with girlfriend Grace McGovern, completed his smart attire with a crisp white shirt and spotted navy blue tie. He kept his hair slicked back, tied in a ponytail.
The Serge DeNimes fashion designer, who is currently filming for the sixth series of the E4 reality show, was all smiles as he left the venue with model Grace, who towered over him wearing chunky patterned wedges.
Grace looked glam and equally stylish in a simple outfit, showing off her long legs in a black playsuit and keeping the chill off her shoulders by wearing a black blazer.
The couple, who both got each other's initials tattooed on their bodies last month, was seen sharing a private joke with one another as they clutched large goody bags while standing outside.
But perhaps the biggest surprise of the night was Proudlock's specs! We're used to seeing him wear his trademark patterned glasses, or one of his more colourful pairs, but last night he kept it simple and stylish in a black pair.
Well, Proudlock and Grace certainly make one stylish couple!