How does she do it? Hendricks knows a thing or two about hair or makeup (she's been dying her naturally blonde hair since she was 10) and finally, the actress has let us in on a few beauty secrets in an interview with Redbook magazine.
As for her favourite makeup product, Nars Velvet Matte Lip Pencil in Pop Life is her fail-safe lip colour and Fresh Cannabis Rose is her signature fragrance.
"It helps me get into [character as] Joan, so I spray it on before I go to work," Christina says.
In fact, Joan Harris-inspired makeup has always been Christina's staple look.
"I've had a go-to look for years that's pretty similar to Joan Harris'," she says. "I do black liquid eyeliner along my top lashes, rosy cheeks, and pink, red, or coral lips. That feels the most me."
Just another reminder that vintage-inspired beauty never gets old.
More of the Mad Men star below: