The elder daughter of Prince Andrew, Duke of York and Sarah "Fergie" Ferguson stepped out with property tycoon Edo for an elegant gala event at London's National Portrait Gallery.
Beatrice wore a quirky crimson Alaia midi-dress made with luxurious velvet fabric which stopped just below the knee.
The designer piece reportedly retails for more than $10,400 AUD.
The granddaughter of Queen Elizabeth paired the look with a stylish pair of midnight blue Jimmy Choo platform heels and toted a small black clutch as she walked alongside her man.
The 30-year-old Princess has kept her budding relationship out of the spotlight since she started dating the 34-year-old millionaire last October.
WATCH: Princess Beatrice Has a New Boyfriend, and He's Casually a Multi-Millionaire
The outing comes two weeks after Beatrice and Edo were spotted leaving London hotspot The Chiltern Firehouse in the early hours.
Edo, who is a longtime friend of the family through his late stepfather Christopher Shale, was confirmed to be dating the young royal when they quietly attended the third annual Berggruen Prize Gala in New York City together in December.
The real estate heavyweight shares two-year-old son Christopher Woolf - known as Wolfie - with his former fiancée Dara Huang.