Keira Knightley went short and sweet for the Chanel Spring 2011 runway show in Paris at the the Grand Palais on Oct. 5.

The 25-year-old actress -- and star of the Coco Mademoiselle fragrance campaign --paired a classic Chanel tweed blazer with a gold dress and Miu Miu satin platform pumps. And while her ensemble was très chic, it is her new 'do that has people buzzing. Knightley debuted a chic bob while attending the event.

Knightley sat front row alongside expectant mom Lily Allen, "Gossip Girl" Clémence Poésy, and Vanessa Paradis (wife of Johnny Depp).

Designer Karl Lagerfeld took a cue from London Fashion Week and featured 53-year-old former model Inès de la Fressange in the show. At the other end of the age spectrum, a male model held his 2-year-old son's hand as they marched down the runway in matching Chanel jackets. Aww.

In related news, check out our beauty round-up of Paris Fashion Week so far.