Mario Lopez and Khloe Kardashian Odom are officially joining the US version of The X Factor.

The Extra host and the Keeping Up with Kardashians co-star will host the second season of the Fox talent competition. The network said Tuesday that Lopez and Kardashian will first appear as hosts during the show's live broadcasts beginning in November.

X Factor judge and executive producer Simon Cowell called Tuesday's announcement "the worst kept secret in Hollywood".

British television personality Steve Jones served as the show's host for the first season.

The addition of Lopez and Kardashian is the latest shift for the underperforming singing content. Britney Spears and Demi Lovato joined Cowell and LA Reid on the X Factor judging panel for the second season. The pair replaced Paula Abdul and Nicole Scherzinger.