The 26-year-old brother of new mum Kate Middleton kept his beautiful blonde girlfriend close by at London's latest nightspot.
James was dapper in jeans, a blue blazer and a crisp white shirt which was open at the collar, revealing a glimpse of his chest. He also sported a full beard to boot.
CLICK ON PHOTOS FOR FULL GALLERY
Donna, meanwhile, looked as pretty as ever in a blue patterned dress, black high-heeled ankle boots and a matching clutch bag. Her blonde locks were in natural-looking waves and her make-up was subtle.
The mum-of-one appeared delighted to be in the company of her dapper boyfriend after heading out solo to a Samsung party earlier that evening.
A romance began to blossom between the TV personality and James back in February when the pair met at Robin Birley's private members' club in Mayfair.
They finally went public with their relationship in April when the duo were first spotted together, leaving LouLou's private members' club hand-in-hand.
Since then they have been hitting London's hotspots, the latest of which is run by ex-Made In Chelsea star Diego Bivero-Volpe and Antoin Commane.
Vodka and caviar will be on the menu at Kensington's new Ruski's Tavern.