Ten of the professional partners were revealed on February 11, 2015, on Good Morning America.

Eleven of the celebrity competitors and their professional partners were revealed on Good Morning America on February 24, 2015.

Len Goodman, Carrie Ann Inaba, Julianne Hough, and Bruno Tonioli returned as judges.

Color key: Individual judges' scores in the charts below (given in parentheses) are listed in this order from left to right: Carrie Ann Inaba, Len Goodman, Julianne Hough, Bruno Tonioli.

Couples performed one unlearned dance to celebrate the most memorable years of their lives.

For each dance-off, the couple with the highest score picked the opponent against whom they wanted to dance; the chosen opponent was allowed to pick the dance style (from cha-cha-cha, foxtrot, or salsa).

Couples performed one unlearned dance, and a routine coached and styled by one of the four judges.