14/08/2014 12:45 BST | Updated 20/05/2015 06:12 BST

Princesses Beatrice And Eugenie Master The Art Of Chic Summer Style

Both Princess Beatrice and her sister Eugenie attended the Serpentine Gallery's annual summer party in London together on Tuesday night.

The two brought a regal elegance to the A-list event and proved they've both got a knack for understated, stylish dressing and accessorising. (Loving the boxy clutch bags, ladies.)

Beatrice looked amazing in a white organza dress by Nicholas Oakwell - think 1950s style, floral applique detailing from the bodice down and sheer cap-sleeved top. The lilac sandals and the lime green hand-held? Very well played and so on trend.

Princess Eugenie is all about low-key, casual-chic dressing these days and last night's look was proof that she does it well. The royal looked confident and collected as she posed for photos in a pale blue shift dress, nude peep-toe heels and a pair of blingy drop-earrings

Both royals were joined by their boyfriends at last night's event too. Princess Eugenie and Jack Brooksbank are clearly making the most of her being in London right now (she spends most of her time in NYC since she moved their for work).

Princess Beatrice and Dave Clark were also all smiles as they mingled with the likes of Suki Waterhouse, Bradley Cooper, Alexa Chung and Cara Delevingne. Oh to have been sipping on champagne and busting out our best moves to Pharrell's DJ set with this celebrity clique.

LOVE A CELEBRITY 'DO WITH A ROYAL APPEARANCE? So do we, so do we. Take a look through this gallery to see all of last night's glitzy, completely glamorous guests mingling.