Britain's Got Talent judges Amanda Holden and Alesha Dixon are reportedly "unhappy" after it emerged that they are allegedly being paid less than half that of fellow judge David Walliams.

Holden and show creator Simon Cowell have been with the show since its first series in 2007, with Dixon and Walliams joining the show from series six in 2012.

According to The Sun, comedian Walliams is paid £1.5 million per series, compared to £700,000 for Holden and £450,000 for Dixon - although all three are dwarfed by Cowell's £2.5 million-a-year pay packet.

"Everyone is in agreement Simon deserves his wage as he's the boss, but there seems no obvious explanation as to why David should be paid more than the women," a source told the newspaper.

"It's madness a bloke should be paid considerably more than a woman for doing identical jobs.

"Amanda and Alesha both bring something different, and brilliant, to the table, and are both very popular.

"Obviously they're not happy and given Amanda, in particular, is so passionate about standing up for what's right, she won't let this lie.

"She wants to fight and ensure this gender pay divide is a thing of the past once and for all."

Cowell was said to be unaware of the pay disparity but will now push for Holden and Dixon to be paid the same as Walliams.