When Christina Hendricks told us she's had plenty of practice colouring her own hair, and in fact still occasionally grabs a box in a pinch, we wondered how long it would be before she signed a contract with, say, Clairol. And here we are: today P&G announced that the flame-haired star is their new Nice'n Easy ambassador.

A natural blonde, Christina says her obsession with Anne of Green Gables prompted her to go red when she was just 10 years old. A host of other colour adventures followed, but red made a powerful comeback in her modelling days -- when she went red for a shoot for Clairol, as it happens. Her fiery hair made her stand out in a sea of more commonplace blondes, so red became her signature colour. And when she landed the role of Joan Holloway on Mad Men, Christina was an immediate bombshell-redhead hit.

Christina's first promo for Clairol Nice'n Easy echoes her own adventures with finding the red that makes her feel most confident. The #shiftashade campaign encourages women to experiment a bit with natural-looking hair colour just a shade or two away from what they've always been.

Let's take a look behind the scenes at the star's first shoot for the Clairol Nice'n Easy #shiftashade campaign (the hairstylist on set is Ken Arthur; he's done a ton of haircare campaign shoots): 

In this on-set interview, Christina talks about going red for Clairol at 19, her home-colour secrets to getting it right, why Joan Holloway scares her, and what she's learned from her star-making character. Plus, catch a sneak peek at Christina's Nice'n Easy commercial spot and print ad launching this month.

What do you think? Is Christina Hendricks a natural for this Clairol gig or what? Does she inspire you to take chances with your own colour? Would choosing something a shade or two away from your usual take you outside your comfort zone?