The Mad Men actress, 39, is set to show off her fiery tresses in all their glory while appearing in advertising campaigns for the brand, which will roll out this month.
Speaking about her new glamorous role, Christina said: "I'm so excited about being the new Nice 'N Easy ambassador, it's a product I've been using ever since I went red.
"I love that the results are so natural looking; I know it's going to turn out natural and beautiful and I don't have to worry about it."
While we all know and love Christina as a redhead, her mane is naturally a dark blonde hue, but she was first inspired to hit the hair dye by the heroine of Lucy Maud Montgomery's books, Anne of Green Gables.
She then took the plunge and coloured her bonce for an Italian magazine photoshoot, and has held on to her trademark bold shade ever since.
"People never believe that I do my hair colour myself at home," Christina adds. "They say, 'You don't do your hair at home by yourself, do you?' and I always reply and say, 'I honestly do!'"
Sounds like she's a hairdresser in the making!
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