Dermot O'Leary steps out with his wife Dee Koppang at the British Vogue and Tiffany & Co party

Emma Watson undergoes outfit change for British Vogue and Tiffany & Co afterparty

Jourdan Dunn displays her endless pins in a leopard print mini-dress at British Vogue bash

Pixie Lott cosies up to fiancé Oliver Cheshire at British Vogue and Tiffany & Co party