Washington, Sept 9 (ANI): Celebrity judge Simon Cowell is planning an extravagant birthday bash for himself when he turns 50 next month.

Cowell is all set to shell out 250,000 pounds for a glamorous party to celebrate his birthday on October 7, say reports.t is believed 400 celebrity friends of Cowell will descend at Hertfordshire's Wrotham Park to join the celebrations.

Contactmusic quoted a source as telling the Daily Mirror: "Simon's been planning this party for months and the guest list is phenomenal - a 'Who's Who' of the celebrity world.

"It's going to be the highlight of the showbiz calendar. Simon's not a massive party person, so when he says he's going to do something, he does it in style."

Stars expected to attend the party include music maestro Sir Elton John and his partner David Furnish, actor Kevin Spacey, actress Denise Richards, supermodel Kate Moss, Aussie pop princess Kylie Minogue, his co-judges from talent shows and most of his recording artists.

The insider added: "All his recording artists have been invited.And all the judges on his shows from both sides of the Atlantic.

"He's always incredibly composed but he'll definitely be toasting his birthday properly. There will be champagne on tap, plus a three-course banquet.

"But he can't get up to too much, as his mother Julie is the guest of honour." (ANI)