Sienna Miller discusses 'fangirling' over working with Amelie Bea Smith - the voice of Peppa Pig

Sienna Miller dazzles in a beaded one-shoulder gown at the Vanity Fair Oscars' afterparty

Jessica Chastain, Rita Ora, Heidi Klum, Kim Kardashian and Julia Fox at Vanity Fair's Oscars party

Sienna Miller flaunts toned abs as she walks the Chanel Pre-Oscar Awards Dinner red carpet