On Sunday, the actress took to Instagram to share a photo of herself looking fantastic as she posed in a pastel pink plunging triangle bikini with high-waisted bikini bottoms. The 44-year-old's two-piece suited her hourglass figure so well. January completed the look with matching pink acrylic earrings, rose gold jewelry and a very mischievous grin – fans quickly realised why.
WATCH: January Jones slides into her incredible living room at LA home
The mother of one had been teased earlier this month for a photo that she posted of herself wearing low-key sports attire. So, January captioned her new all-pink bikini photo with the message: "TOXIC FEMININITY - Apparently you guys didn’t appreciate my attempted Nascar’esque rebranding so here ya go."
The Mad Men star looked fabulous
January's 1.1 million strong Instagram following are familiar with her tongue-in-cheek posts and they loved her fun clap back. One fan applauded her for being such a "captivating comedienne". Other fans were so enamoured by her photo that they gushed: "You are so freaking beautiful!"
A third fan added: "God damn!" Meanwhile, other fans were keen to encourage January's quirky side and replied: "Your NASCAR-esque adventures are the best part. A-typical with a lot of personality".
The star's Nascar attire tickles fans
The star of the X-Men franchise is mother to 11-year-old son Issac, and while she has never publicly revealed the father of her son is, the doting mom marked his September 13 birthday on Instagram with the message: "My son is 11yrs old today! I’m coping just fine (obviously), with grace and reflection."
Like this story? Sign up to our HELLO! newsletters to get other stories like this delivered straight to your inbox.