Harry Styles is used to meeting adoring fans. But he turned shy when he came face to face with the Duchess of Cambridge. Glancing nervously at the Duchess' bump, he mumbled his congratulations about her forthcoming child, commenting afterwards that the Royal, 'didn't look bumpy'.

In contrast, Kate, looking stunning in a floor length lace Diane von Furstenburg gown, was perfectly at ease and grinning from ear to ear. So much so that ELLE wonders if she is a secret One Direction fan. What else could have prompted William to later promise that he had been 'keeping a close eye' on the pop stars?

Harry was dressed in typical heartthrob uniform of a leopard print jacket and skin-tight black jeans.

The Duke and Duchess were attending the star-studded Royal Variety Performance in place of The Queen.

Along with One Direction, Ellie Goulding, who famously sang at Kate and Wills' wedding, and Ed Sheeran also took to the stage.