The heptathlete said she would "definitely" like to be involved with the show after it was reported that producers are sounding out Team GB stars to appear on the programme.
However, Ennis said she had not received a formal approach about an appearance on the hit ITV1 show. She said:
Asked whether she would be interested in appearing on the show, Ennis said:
However, two athletes that will not be appearing on The X Factor are Sir Chris Hoy and Tour De France winner Bradley Wiggins.
Sir Chris tweeted:
The men's time trail gold medallist Wiggins was similarly dismissive when asked about The X Factor.
Show bosses are apparently keen to acknowledge the UK's sporting success at London 2012 during the first live edition of the series and have reportedly approached double gold winner Mo Farah for a role.