MULTI-MILLIONAIRE music mogul Simon Cowell looks set to celebrate his 50th birthday with a massive party at a stately home near Potters Bar. The bash, at Wrotham Park, is reportedly being organised by the X Factor judge's close friend

MULTI-MILLIONAIRE music mogul Simon Cowell looks set to celebrate his 50th birthday with a massive party at a stately home near Potters Bar.

The bash, at Wrotham Park, is reportedly being organised by the X Factor judge's close friend Sir Philip Green, the billionaire owner of the Arcadia retail group.

Cowell, who is thought to be worth �120m, will be joined by 400 guests, including a number of A-List celebrities from the world of music, film and fashion.

Pop legend Sir Elton John, supermodel Kate Moss and Hollywood actor Kevin Spacey are among those said to have been invited, together with Cowell's fellow X Factor judges Louis Walsh, Dannii Minogue and Cheryl Cole - who incidentally married her footballer hubby Ashley Cole at Wrotham Park.

His colleagues from Britain's Got Talent, actress Amanda Holden and former Daily Mirror editor Piers Morgan, are also expected to attend.

The black-tie event is understood to have a 1920s theme and will feature a cocktail party and a free bar, together with a sumptuous three course meal.

The total cost of the bash is thought to be in excess of �500,000.

A spokeswoman for Wrotham Park confirmed that the party would be taking place, but refused to divulge any further details.

She said: "We have got an obligation to protect our client's confidentiality."