Julianne Hough to guest judge on 'Dancing With The Stars'

Julianne Hough is returning to "Dancing With The Stars," but this time, she will be a judge.

Hough served as a two-time professional champion on the competition and has accepted an invitation to guest judge on the show's October 7 episode.

She joins regular judges Bruno Tonioli and Carrie Ann Inaba.

Hough is the sister of the show's Emmy-winning partner Derek Hough and won the trophy two times: Once with Olympic speed skater Apolo Anton Ohno and again with Indianapolis 500 racer Helio Castroneves.