The couple headed to Debenhams on Oxford Street where they joined a slew of celebrities at the launch of Chi Kitchen - a new pan-Asian restaurant.
Making sure they were dressed to impress for the occasion, Ritchie cut a dapper figure in a grey plaid suit while Natasha stunned in a glamorous black dress with a lacy overlay and thigh high split.
She teamed her stylish number with a pair of slinky red heels, her auburn locks in loose curls and a fabulous cerise pink lipstick on her lips.
As well as dining on an array of tasty dishes, Natasha and Ritchie rubbed shoulders with the likes of TOWIE's James Arg Argent and Nicole Bass, pregnant Life On Marbs star Alex Weaver and her co-star Jordan Sargeant and Dan Osborne and fiancée Jacqueline Jossa.
Their appearance in the capital comes after Natasha and Ritchie announced their engagement.
During a romantic trip to Rome, Ritchie had popped the question, presenting Natasha with a gorgeous diamond ring (that she kept out of sight on arrival to Chi Kitchen). She later showed off her new accessory on Twitter and told Reveal Ritchie had picked the "perfect" ring for her.
She said: "I was blown away when Ritchie proposed to me, it was such a romantic moment."
Ritchie, meanwhile, gushed: "It was an emotional moment when I proposed in Rome and I was relieved Natasha approved of the ring choice!'
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