"The Prince of Wales is delighted to announce the engagement of Prince William to Miss Catherine Middleton," read the official statement from the royal family in November. However, Prince Charles -- or any other member of the family, for that matter -- is less delighted to announce that William's little brother Harry is planning the bachelor party.

"Harry is a rascal," one royal insider tells me. "He is in trouble with a capital T. A young prince that loves to have fun and go out partying at all the cool spots in London is planning her future husband's bachelor party. Kate should be nervous!"