The couple were out on a romantic dinner sate at Park Chinois, Chinese restaurant in Mayfair in the late hours of Friday morning.
The pair turned heads after not being seen in public together for weeks.
The couple left the restaurant separately choosing not to be pictured together with Rihanna, 29, exiting out the back door at around 2am.
She then sat in her car for half hour before Hassan left out of the front door of the restaurant a 2.35am.
Rihanna wore an all black, spilling her curves into a sweater and a mini-skirt, showcasing her pins.
The billionaire kept a low profile with a baseball cap pulled lowly over his eyes. He looked casual in a T-shirt and jacket, jeans and converse in mud green.
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