The couple, who were crowned winners of this year's ITV dance competition Stepping Out, were all smiles as they arrived at The Amy Winehouse Foundation Ball, held at the Dorchester Hotel.
AJ and Oritsé looked immaculate as they posed for photographers on the special pink carpet. AJ, real name Aimee Jade, oozed sophistication in a strapless, satin floor-length gown.
Sporting short, sleek hair, AJ completed her look with minimal make-up, adding just a slick of red lipstick.
Meanwhile, Oritsé, who wore white jeans teamed with a crisp white shirt and gold collar tips, finished off his outfit with a black leather jacket.
During the event, which was attended by the likes of Pixie Lott, Mark Ronson and EastEnders star Barbara Windsor, AJ and Oritsé placed a bid for an authentic signed guitar by Michael Jackson - and they won!
Oritsé, along with bandmates Marvin Humes, Aston Merrygold and JB Gill, are preparing to bow out and go their separate ways at the end of the year after six years together. Sob! Their last ever single, 'Billion Lights', was released last week, which is taken from their final album, Goodbye: The Greatest Hits.
Watch the music video for JLS' song 'Billion Lights' below: