Kate wears Whistles polka dot dress for Teen Hero Awards reception

The Duke and Duchess of Cambridge made an unannounced appearance on Wednesday!  The royal couple hosted the  finalists of this year's BBC Radio 1's Teen Hero Awards at their home in Kensington Palace.

And back in London at KP, William and Kate hosted @BBCRadio1PR Teen Heroes w/ DJs Clara Amfo & Greg James on Wed. Winners Siena, 16, works to support students with autism and learning disabilities; Lily, 14, a wheelchair motocross competitor & anti-bullying campaigner Junior, 14. pic.twitter.com/bSnoUZm22H

— Emily Andrews (@byEmilyAndrews) October 19, 2018

Kate debuted the Whistles 'Margot' Spot Shirt Dress (£159). The burgundy-hued frock is currently available at these retailers: Whistles,  John Lewis, Selfridges, Bloomingdales, and The Hut.

In the photo below it looks like Kate may have worn her Gianvito Rossi 'Gianvito 105' Praline Suede Pumps.

Image source: Kensington Palace (Twitter @KensingtonRoyal)

It appears she finished the look with her Cassandra Goad Temple of Heaven Earrings.