Princess Eugenie and Beatrice attend London party with Taylor Swift

Princess Eugenie appeared at Poppy Delevingne's 40th birthday in London Thursday evening, with her baby bump noticeable under a black dress and a bright purple jacket.

The 36-year-old royal, awaiting her third child this summer, was joined by her spouse Jack Brooksbank for the event.

Her older sister, Princess Beatrice, also attended, arriving at the venue with her husband, Edoardo Mapelli Mozzi.

Both York sisters maintained cheerful expressions despite their parents, Andrew Mountbatten-Windsor and Sarah Ferguson, facing ongoing issues.

Taylor Swift and her fiancé, NFL star Travis Kelce, travelled to the city especially to celebrate with Ms. Delevingne.

The guest list featured British high society and entertainment elite, with Georgia May Jagger, Damian Hurley, and Lily James among those attending the celebration.

Fashion icons Alexa Chung and Pixie Geldof mingled with Nicky Hilton and filmmaker Baz Luhrmann throughout the night.

Poppy's supermodel sister, Cara Delevingne, was there to support the birthday festivities, along with other relatives and friends.

The evening's events started at the Hart pub in Marylebone, just across from the famous Chiltern Firehouse.

After several hours at the pub, the celebration moved to the BoTree hotel near Oxford Street in Soho for a late-night after-party.

Poppy Delevingne, celebrating her milestone birthday on Sunday, shone in a sequined playsuit with a fluffy coat.

Princess Maria-Olympia of Greece and Denmark, Jaime Winstone, Isla Fisher, and Emma Weymouth were also among those celebrating the model and socialite.

Eugenie's pregnancy was officially announced by Buckingham Palace on Monday, providing a rare positive moment for the royal family amid her parents' ongoing troubles.

The news was released by the monarch's office, with King Charles personally sharing his happiness about the news.

The couple's sons, August, five, and Ernest, two, are eager to meet their new sibling, as seen in a picture Eugenie shared showing the boys holding the baby's scan image.

The new addition to the family will become 15th in line for the throne.