January Jones is the new face of Kérastase Nutritive.
The 38-year-old 'Mad Men' star has admitted she is "flattered" to have joined forces with the hair care brand, which has been recognised as the leading dry-hair expert since 1979, because she is a "real fan" of the items and has "always" stocked her bathroom shelves with the label.
Speaking about her latest beauty venture, the actress said: "I jumped on the opportunity to work with Kérastase because I'm a real fan of the brand and have used the products for years.
"I was flattered and excited to be asked to endorse a brand that has been on my bathroom shelves for ages. It has always been very important for me to be as authentic as possible in the things I stand by and endorse, so it was a no brainer for me. I've also had the opportunity to work with great artistic people on the campaign, which is always inspiring."
Meanwhile, mother-of-one January - who has a four-year-old son, Xander - has revealed she has "never" exercised and doesn't enjoy working out because she was put off by her personal trainer father Marvin Jones.
Speaking previously to InStyle magazine, January said: "I have never exercised in my life. I don't like exercising. My dad was a trainer, so it was like a way for punishment."
However, January has begun taking classes that combine ballet style barre work with light weights, although it has seen her gain weight.
She explained: "In January, I started doing Cardio Barre and I've been loving it. And the only complaints I have is that I've gained weight, but it's fine. I feel better. I feel stronger. It's muscle, obviously. I gained weight, but I feel tighter and more energetic, and exercising is legit."
January will grace Kérastase Nutritive campaigns from June.