The former Desperate Housewives actor is rarely seen without Cara by his side these days and so naturally he brought her along to keep him company at the Affinity Real Estate Shooting Stars Benefit dinner in the UK capital on Thursday evening (13 June).
The happy couple - who have been together for five years - dressed to impress for the occasion and both looked bronzed after their recent break in Monte Carlo, where Jesse had been promoting his current TV show, Dallas.
Cara wore a short black dress that flattered her petite figure and finished off her look with a pair of pointy black heels, an orange clutch and sleek hair.
Meanwhile, Jesse co-ordinated with his fiancée by wearing a black shirt with black trousers and a grey blazer.
The pair rubbed shoulders with other famous faces on the night, including Samuel L Jackson and Rupert Grint, who had all stepped out to support the cause.
News of Jesse and Cara's engagement surfaced last January and the couple have been seen cuddled up in numerous public displays of affection ever since.
In April, the twosome were spotted cosied up court side at a local basketball game and Cara even managed to drag Jesse to a Rihanna concert the night before.
What do you think of Cara and Jesse's outfits for the Benefit dinner? Let us know below!