The X Factor USA is to offer viewers the ability to vote for their favourite contestants via Twitter when the knockout stage begins on 2 November.

A dedicated site has been set up which directs Twitter users to follow the @TheXFactorUSA account in order to submit a free direct message which will be counted as a vote.

The votes cast via Twitter will be aggregated with those from phone calls, text messages, smartphone app and via the website.

In a statement on the site explained the aim was to engage fans who have been using Twitter to discuss the show.

“Direct message voting provides a direct line for fans to impact the show like never before,” it said.

The X Factor USA airs on Fox and is co-produced by FremantleMedia North America and Simco.