Simon Cowell has finalised plans for Madonna and Robbie Williams to appear on The X Factor this year, a report claims.

The music mogul was first said to be wooing the stars last month in an attempt to top the 2008 final, which saw Beyoncé performing with show winner Alexandra Burke.

According to The Sun, the programme’s choreographer Brian Friedman has now “blabbed” to friends that Cowell has finally convinced the pair to take part.

A source explained: “Brian is really excited about this year’s show because there are some great artists involved.

“He is proud to be part of it and admires Simon’s ability to attract A-listers.”

It is believed that Madonna and Williams will offer masterclasses to the contestants once the live shows start. Whitney Houston, Rihanna and Shakira have also been tipped to appear.

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Tags: alexandra burke, beyonce, brian friedman, Madonna, rihanna, robbie williams, simon cowell, whiteney houston, x factor