The couple have only just gone public with their relationship in the last month or two and have been pictured looking loved-up on various dates in both England and America, as well as posting candid snaps of each other on their Instagram accounts.
Calvin even referred to Rita as his "missus" in an interview with MTV UK last week, so we know it must be serious!
Since the two artists were both in New York over the weekend, they made sure to spend some quality time with one another amid their hectic schedules.
Rita, 22, attended the MTV VMAs on Sunday (25 August) and stole the show in a stunning feathered dress.
But it sounds like she was eager to hook up with Calvin soon after, as she uploaded a picture of her adorned in jewellery while waiting in a car, along with the caption: "Chill...waiting for my baby."
The next snap she posted was of her DJ beau sat beside her and making a rather rude gesture.
Meanwhile, Calvin was noticeably pleased to see his chart-topping girlfriend, since he uploaded a pretty picture of Rita sitting on a bed wearing ripped jeans and a plain white T-shirt.
The photo also shows Rita's new, sleek and poker straight bob cut, which she debuted on the VMAs red carpet.
Calvin wrote the intriguing caption: "Conference call" beside it.
The couple have now had to go their separate ways once more, as they get back to work.
Rita has remained in the Big Apple to carry on with her commitments and yesterday (28 August) she was spotted out and about with her stylist pal, Kyle, looking like she meant business in an all black ensemble.
The pop star wore leather trousers with chunky boots, a long black T-shirt and a blazer. She accessorised with chunky jewellery and a pair of fierce, feline-shaped sunglasses.
What do you think of Rita's outfit? Let us know below, as the best comment each week wins £50!