Witney Carson, Carson Mcallister Witney Carson, Carson Mcallister

Dancing with the Stars pro Witney Carson will be dancing with a new rock on her finger this week.

The Season 19 champ, 21, is engaged to her high school sweetheart, Carson Mcallister, 23.

Carson, who is partnered with Carlos PenaVega for the current season of Dancing, announced the news via an Instagram post on Saturday, saying she feels like the "luckiest, happiest woman in the world."

Fellow pro Allison Holker posted a picture of herself and Carson in the Dancing with the Stars rehearsal space on Saturday to wish her colleague congratulations.

Ahhhhhh I am so unbelievably happy for this girl right here !!! She's engaged!!! Love ya @witneycarson #engaged

A photo posted by Allison Holker (@allisonholker) on

Carson and Mcallister have been dating for four years. Check out her announcement below: