Their outing came a few days after Rita appeared to confirm that she and Calvin are a couple by tweeting a picture of them together with the caption: "Miss you."
Rita dressed in a very summery all-white outfit (and no bra) teamed with a yellow shoulder bag, while Calvin stayed casual in jeans and a T-shirt as they stepped out for a spot of brunch on Wednesday (5 June).
The night before Rita, 22, was seen looking ultra-glam at the Glamour Women of the Year Awards, which she attended with her BFF Cara Delevingne rather than Calvin, although according to The Mirror she returned to his home after the event.
'Hot Right Now' singer Rita picked up the Solo Artist prize at Tuesday night's glamour awards, which was presented to her by Cara.
At the weekend, Rita joined an all-star lineup at the Chime for Change concert at Twickenham Stadium, which included Beyoncé, Madonna and Jennifer Lopez.
Could we be seeing Rita joining a lineup with Calvin in the future?!
According to Metro, the pair are thinking about performing a duet together at the Virgin Media V Festival later this summer, with a source saying the pair originally met when their management asked them to consider a duet together.
> Rita Ora performs in weird jeans with face printed on them - pictures
> Rita Ora: colourful tracksuit at Radio 1's Big Weekend - pictures