Mackenzie Ziegler added a jaw-dropping snap to her feed on Monday.

The reality star looked all dressed up in a plunging black dress.

The piece of clothing boasted long sleeves and a neckline adorned with feathers.

Its low front exposed much of her décolletage.

The dress also featured a short hem, but she sported a pair of black stockings.

Mackenzie posed in front of a mirror.

She wore a full glam look and several rings as her accessories.

Mackenzie also wowed fans when she uploaded pics of herself.

She wore another plunging garment — a brown crop top and a black low-rise skirt.