Britain's Got Talent supremo Simon Cowell used the last semi-final to hit back at claims that he has been grooming Norfolk schoolboy Ronan Parke for stardom for two years.

Mr Cowell called in the police after an anonymous person used the internet to claim Ronan, 12, already had a management deal and had been moulded to appeal to the audience.

The blogger said Parke has been known to Cowell's firm, Syco, for two years.

Mr Cowell said on the show last night: 'I've got to say something, I've got to address something that's been in the press today.

'There have been allegations made in the papers, not in the papers actually, on the internet, that Ronan Parke has a previous recording contract with my record label, that I'd met him before, both of which are complete and utter lies.

'The first time I met Ronan was when he appeared on the show, he entered it of his own accord.

'He is 12 years old, this is a deliberate smear campaign and it is my job as somebody who works on this show to make sure whoever this liar is, is exposed, and Ronan is treated the same way as everyone else and it will be the public who decides.'

Ten acts - including Ronan - will be competing tonight in a bid to carry off the crown in the Britain's Got Talent TV show.

Dancer Razy Gogonea and singer Michael Collings won their way through to the final in the last semi-final.

Gogonea won the public vote last night on the ITV1 show, and Collings was the judges' choice to accompany him to the final.

They will now battle it out with Les Gibson, James Hobley, New Bounce, Jean Martyn, Ronan Parke, Paul Gbegbaje, Jai McDowell and Steven Hall.

After thousands of hopefuls auditioned, it is down to the final 10 acts to compete to win the competition, take home �100,000 prize money and win a slot on this year's Royal Variety Performance.

Ronan, from Poringland, has dismissed the claims as 'really silly'.

He told ITV News: 'I have not been coached by anyone to do with Simon. I have never met Simon in my life. I'd love to, but I never have.

'I have been coached by a singing teacher in Norwich that we pay for.

'No one's paid for our clothes or anything. It's really silly.'

The anonymous internet claims resulted in Cowell's lawyers going to a west London police station to report an offence.

It is not yet known if officers will take action.

A Scotland Yard spokesman said: 'An allegation of malicious communications was made to Kensington and Chelsea police on Thursday June 2.

'The allegation is being considered.'

The schoolboy won the viewers' vote on Monday, putting him straight through to today's show.

Syco and Sony Music said in a statement: 'There is no truth in this story whatsoever.

'Ronan first came to Syco/Sony's attention when he entered this year's competition.

'Syco/Sony Music will not hesitate to take whatever legal action is appropriate to prevent further publication of these unfounded allegations.'

Ronan's mother Maggie also dismissed the claims that he was auditioned by talent scouts who had spotted him performing at a birthday party for family friend Bryan Gunn, the former Norwich City goalkeeper.

'It's laughable, to be perfectly honest with you, and it couldn't be further from the truth,' she said.

'There's no foundation in it whatsoever.'

• See Ronan in the final of Britain's Got Talent, tonight on ITV1 at 7pm.

• Check back here later for more updates and to find out how Ronan gets on.