'Dancing With the Stars' Adds Julianne Hough as Fourth Judge

Former Dancing With the Stars champion Julianne Hough will return to the ABC series this season as the show's fourth judge.

Hough joins judges Len Goodman, Carrie Ann Inaba and Bruno Tonioli.

The celebrity cast for the upcoming season will be announced on Good Morning America Sept. 4, with the season premiering Sept. 15.