The two friends have been eager to meet up following their stint in the CBB house earlier this year, and it seems their mini reunion was an eventful one, as Ollie invited Dappy down to Chelsea!
N-Dubz rapper Dappy told fans on Twitter that he had arrived in the popular SW3 postcode on Saturday night (29 March). He tweeted: "Hello Chelsea #TunUp."
Posing for a selfie with Ollie in a club, Dappy said: "I actually love @ollielocke #Chelsea #ElegantS***."
'No Regrets' hitmaker Dappy, who partied with Ollie until the early hours of Sunday morning, later added: "@ollielocke thanks 4 last night bro #Chelsea."
Former Made In Chelsea star Ollie struck up a close bond with Dappy during their time in the house, and the pair often enjoyed impersonating one another - with hilarious results!
It's been quite a week of reunions for Ollie, who also met up with former housemate Lionel Blair for a spot of dinner in London.
The week before, Ollie and Casey Batchelor dined out with the show's winner Jim Davidson, who treated Ollie to a birthday lunch.
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Watch Dappy and Ollie's bromance in the video below: