The Duke and Duchess of Cambridge stepped out for an exciting event on Thursday, attending the annual Royal Variety Performance for the first time ever. Expectant mom Kate Middleton wore a black Diane von Furstenberg dress for the night out, while William looked dapper in a suit. This year's show took place at the Palladium Theater in London, where artists like One Direction, Ed Sheeran, Ellie Goulding, and Demi Lovato [1] will hit the stage for a show that features popular singers, comedians, and dancers. When Harry Styles was asked about meeting Kate, he told reporters [2], "I said congratulations on the bump. [Though] she didn't look bumpy."

The tradition of the Royal Variety Performance dates back to 1912, with members of the royal family attending the show [3] each year to show their support. Proceeds from the event are donated to the Entertainment Artistes' Benevolent Fund, which helps support artists throughout the UK, and Queen Elizabeth II is a patron of the organization. Take a look at all the best pictures from the Royal Variety Performance!