The “Dance Moms” alum took to Instagram and shared a series of sizzling snaps in celebration of her 21st birthday. Mackenzie, or Kenzie, blew her followers away as she flashed some skin in a tiny two-piece.

Ziegler struck poses in the shower as she flaunted her stunning physique in a gray bikini, providing for a seriously NSFW display. The two-piece swimsuit popped against her sun-kissed complexion and the light hue looked eye-catching in natural lighting, though the color hardly seemed to be the detail that caught the eyes of her fans.

The professional dancer stunned her fans in minuscule swimwear that left very little to the imagination. Its daring bottoms had a typical design, but they still looked scanty.

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The high leg cuts highlighted her toned legs, while the waistband was stretched high above her hips, accentuating her trim waist and flat midsection.

Ziegler’s matching top provided an equally-as-risqué display as the lower half of the set — if not more. Her assets nearly spilled out of the garment, displaying a hint of sideboob in addition to the cleavage.

Ziegler appeared to have either enjoyed a dip in the water or a shower, as her brunette locks were damp. She also appeared to have ditched the makeup, confidently showcasing her natural beauty.

In the caption, Ziegler wrote: “Birthday continues.”

Plenty of fans took to the comments section to share their thoughts about Ziegler’s new update. She received a mix of compliments and birthday wishes.

“I am way older than you at 54 about to turn 55, But I love you’d you on dance moms and all your songs, never stop Mack Z: Happy Birthday,” wrote a follower, while another remarked, “My jaws on the ground will u please grab it for me.”

A third user noted, “I am so in love with you.”

The fourth person added, “You so beautiful woman to me.”

Ziegler and her sister, Maddie, talked about their “Dance Moms” days in a past interview with Elite Daily.

The siblings made their debut on the Lifetime reality show during its first season in 2011 and starred alongside their mom, Melissa Gisoni, until leaving the series around season six.

“When did you realize we had an unusual childhood?” Kenzie asked her sister at the time.

“We got pulled out of school every day to go to dance and film a TV show, so that was not normal at all … And then once we started traveling, people started recognizing us. I remember we were in an ice cream store and someone called our names, and we were so freaked out. Like, how did these people know us? And then we realized, ‘Oh, there’s a lot of attention around our show,'” Maddie responded.

Ziegler agreed, noting that she felt like “it was all very stressful as a kid.”