Kate Middleton wore a gorgeous high street dress today, and it’s already out of stock

Snapped up within a few hours.

Kate Middleton stepped out for an unannounced visit today - and looked absolutely gorgeous while doing so. She hosted a reception with her husband Prince William at Kensington Palace for inspirational teens with BBC Radio1.

The Duke and Duchess of Cambridge were honoured to meet the amazing @BBCR1 Teen Heroes at Kensington Palace this week and hear their inspiring stories #R1TeenAwards pic.twitter.com/0492xJCJ2W

— Kensington Palace (@KensingtonRoyal) October 19, 2018

For the event she wore a gorgeous high street find - a €199 Whistles button-up dress - which of course, has already sold out. You can still check it out here. All sizes of the dress are gone, but we're pretty sure the high street designer will restock due to its popularity. She teamed the dress with Gianvito Rossi shoes and a pair of €1,700 earrings. She decided to wear her hair in the classic Kate style of a curly blowdry. This is Kate's second unannounced event this week as on Tuesday she hosted a private meeting for one of her charity initiatives. It's usual that the Palace announces any engagements or events, so to have two unannounced in a week is out of the ordinary.