Into the deep!

As proven by eight years on Mad Men and countless red carpets, January Jones can rock the heck out of both retro and modern styles—and, as a photo shoot with Violet Grey revealed, she can even do topless mermaid-chic!

Daring to bare, Jones, 37, ditched both her top and bra for one sexy image. Her assets were well-concealed, courtesy of “Under the Sea”-worthy extensions, which were draped over her breasts.

The other photos in the spread were decidedly more fashion-focused. In one close-up pic, the X-Men: First Class actress (styled for the shoot by Elizabeth Stewart) worked a star-bedazzled emerald top. In another shot, Jones modeled a plunging raspberry dress with rosebud embellishments.

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While the photo shoot seemed both glam and daring, Jones said that the inspiration was actually quite emotional. “We wanted to…explore the idea that a lot of women, myself included, feel less vulnerable once they’re dressed and have their make up on,” she said.

The mom to Xander, 3, also dished on the finale of hit AMC series. “I was surprised, but the show has always surprised me,” Jones told the e-mag. “Each episode is so good and sort of ties up things—not in a perfect bow, obviously—but I think the audience will be happy.”

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