January Jones sizzled in a sultry underwear photo shared via social media—and the revealing snap left little to the imagination.

On Sunday, Aug. 3, the Mad Men star, 47, took to Instagram with a mirror selfie that turned heads.

🎬 SIGN UP for Parade's Daily newsletter to get the latest pop culture news & celebrity interviews delivered right to your inbox 🎬

"Knees are weak, sleep is sweaty, attitude petty…never let my strength leave me," Jones captioned her update.

In the featured image, the X-Men: First Class star stood on her tip-toes while reaching one arm about her and holding her phone with the other hand. She rocked a flesh-colored underwear set in the full-body photo, showing off her toned body in a bathroom.

In the comments, Jones' followers had to pick their

See Full Page