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January Jones modeled her fit physique in a black-and-white bikini marking the end of summer.
The “Mad Men” alum, 48, was pictured in a series of swimsuit snaps wearing a black halter bikini with white trim details.
Jones smiled sweetly for the bathroom mirror selfie, wearing her shoulder-length blond hair down and opting for a natural look.
In another snapshot, the actress wore a black-and-white striped one-piece swimsuit, pulling her wet hair back to show off the look. And in a third, she rocked what appeared to be a pink and black two-tone bikini top with a sheer, lace-lined coverup.
“☀️👙 almost time for the sweaters but not quite yet,” she captioned the upload Wednesday.
Fans in the comments thread were gobsmacked by the TV star’s glowing snaps.
“Thanks for shifting my concentration,” one person quipped, while another remarked, “Beautiful as always.” A third gushed, “The world’s hottest, at it again. ❤️🔥.”
Others weighed in with rows of heart and flame emojis.
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Jones previously showed off her ageless appearance, modeling nude underwear in another bathroom selfie in August 2025.
“Knees are weak, sleep is sweaty, attitude petty…never let my strength leave me,” she captioned the jaw-dropping pic at the time.
Jones — who is mom to son Xander Jones, 14 — once shared that her diet and exercise routine is anything but rigid, though she does work out several times a week.
“I don’t deprive myself of anything,” the actress told Shape back in 2020. “If I want something — steak, a bagel — I’ll eat it.”
She added, “There’s no diet or strict set of rules.”
And despite her glam swimsuit photos, the “Anger Management” actress divulged that she’s not above wearing extremely comfortable clothing, noting that she feels “comfortable” in her skin.
“Public opinion doesn’t matter to me,” she said, recalling how she went to a birthday party with her son while wearing “humongous red sweatpants” — which she noted her sister called her out on.
Jones remembered that she paused, but still opted for the sweatpants. “Who cares? They’re my period pants!” she said.
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