Some of Hollywood's biggest stars have come out in force for the Toronto International Film Festival.

Julia Roberts stepped out for the world premiere of her latest film August: Osage County in a head-turning red Dolce & Gabbana minidress.

The showstopping number, which featured bell sleeves and a subtle lace pattern, was complimented by leg-lengthening nude strappy sandals and a boxy clutch.

Roberts finished off the gorgeous look with a loose updo and a sultry smokey eye.

Also impressing in the style stakes was Jessica Chastain, who looked every inch the Hollywood starlet at the premiere of The Disappearance Of Eleanor Rigby: Him And Her. She chose an aquamarine Atelier Versace dress which featured waist-cinching ruching and a floaty chiffon skirt.

Singer Taylor Swift ensured all eyes were on her when she attended the One Chance premiere wearing a custom-made Calvin Klein dress. The minimal design featured a high neck, cut-outs at the waist and an open back.

The ever-stylish Mila Kunis stunned in a white lace Burberry Prorsum frock which was the perfect combination of demure and racy, with a navel-grazing neckline and below-the-knee skirt.

Marion Cotillard showed off her legs in a Christian Dior dress that was short at the front with a long flowing skirt at the back. The slightly sheer dress was set off with two-tone pointed Dior heels.

Olivia Wilde was a welcome burst of colour at the Third Person premiere in a bright yellow Valentino frock with a full pleated skirt and open back. The actress completed the look with hot pink lipstick and Jimmy Choo pumps.

Juliette Lewis looked elegant at the TIFF in a Naeem Khan champagne-coloured short-sleeved silk-crepe gown with gold floral beading on the upper part of her frock and a gold band accenting the waist.

Keira Knightley was effortlessly chic in a strapless Mary Katrantzou landscape print frock.

Sandra Bullock rocked another strapless number by Narciso Rodriguez design, which featured black, cream and teal dress panelling.