Kate Middleton, is that you?!

The Duchess of Cambridge looked more skinny than usual during a royal visit to the RAF Air Cadets at RAF Wittering in England on Tuesday, Feb. 14.

The 34-year-old donned a pair of black pants and black boots that showed off her thinner-than-usual legs, as well as a red button up coat that highlighted her slimmer torso. At the event, Kate exemplified her sporty side by doing a plethora of exercises with the young children there. Such a fit mom!

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Kate on Feb. 14.

This marks the second headline-making look for Kate this week. On Sunday, Feb. 12, the mom-of-two donned a risque skin-bearing dress to the BAFTAs that showed off her rather bony chest and thinner frame.

MORE: Kate Middleton's Wedding Dress — Everything You Need to Know About Her Gown!

Kate's diet secrets have recently been revealed — and it's nothing that any of us can't do! The future Queen simply favors a low-carb diet, and swaps out the bad carbs for good carbs.

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Kate and William on Feb. 12.

"She brought the Dukan diet into the spotlight when she followed the plan to get in shape for her wedding," said Frida Harju, an in-house nutritionist at Lifesum. The Dukan diet is a French-inspired, protein-based way of eating. Kate is also a big fan of juicing!

MORE: Kate Middleton Is Asked by a Little Girl What It's Like to Be a "Real Princess" — and Her Response Is Too Cute!

In a previous interview, her handsome hubby, Prince William, joked his wife's efforts in the kitchen are the reason why he's so skinny! "William has to put up with my cooking most of the time," Kate admitted of the couple.

Click through the gallery below to see photos of Kate showing off her slim figure!