A new, dynamic cast of celebrities are ready to hit the ballroom floor. The competition begins with the two-hour live season premiere (which is also the show's 400th episode!). Each couple will perform a tango, cha cha, salsa, Viennese waltz, and quickstep, vying for America's vote for the first time.

After showcasing their first dances on last week’s exciting season premiere, the celebrities get another chance to impress the judges with a new style of dance, all the while knowing that one of them is going home at the end of the night, based on scores and votes from last Monday.

The 10 remaining celebrities will take a stroll down memory lane and celebrate with a dance to a time in their lives that left a lasting impression, as they commemorate their most memorable year.

The Disney spirit shines as Mickey Mouse, Minnie Mouse, Goofy, Donald Duck and Daisy Duck, among other numerous Disney animated legends, adorn the ballroom and the couples bring the magic of Disney to life.

The eight remaining celebrities will dance to songs from some of the most popular boy bands and girl groups throughout history, and the men and women will also compete against each other in team dances. Nick Carter is a guest judge.

Mandy Moore kicks off the night with an exciting opening number, then each couple will attempt to capture the spirit of a specific movie genre. As an added bonus, Dove Cameron, Cameron Boyce, Sofia Carson and Booboo Stewart perform a “Descendants”-themed medley.

The five remaining couples find themselves tasked with completing two full dances. In the first round dance, the pros will choose the song and dance style, and for the second, the couples will perform in a Trio Round with a new twist, in which the judges have chosen the trio partners.

The four remaining couples dance a Judges' Challenge.

The three remaining finalists each perform two dances.

A new champion is named!