Ashleigh And Pudsey won Britain's Got Talent on Saturday night

Britain's Got Talent winner Ashleigh Butler is reportedly putting her dog Pudsey on a strict diet and work-out regime because he's gained weight.

It seems Pudsey - whose amazing dance skills nabbed him and handler Ashleigh the £500,000 prize and the chance to perform at the Royal Variety show - has been overindulging.

'Recently he has been given lots of treats to help him with live shows and practice and also during photo shoots - and fans are keen to give him food too,' a source tells the Daily Mirror.

'He has put on up to 6lb and has the beginnings of a tummy.'

Ashleigh, 17, is said to have splashed out £500 on a special doggy treadmill for Pudsey and banned him from his favourite ham and cheese treats.

Since winning the talent show, Pudsey has met a string of stars including Gary Barlow, Kanye West and Kim Kardashian.

'I'm keeping up with a Kardashian @KimKardashian #letsconga,' Pudsey Tweeted to his 28,162 followers aong with a photo of himself and Ashleigh with the reality TV star.

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Esme Riley