Guess who's back? Pippa Middleton goes svelte

Pippa Middleton attends as Spectator Life magazine celebrates its third birthday at the Belgraves Hotel. (Getty Images)

(Getty Images)

Andrew Neil and Pippa Middleton (Getty Images)

(Getty Images)

Anastasia Webster and Stephen Webster (Getty Images)

Linzi Stoppard (Getty Images)

Lucy Mecklenburgh (Getty Images)

Lavinia Brennan (Getty Images)