04/01/2012 13:55 GMT | Updated 05/03/2012 10:12 GMT

Pippa Middleton Planning Surprise 30th Birthday Party For Kate Middleton

Duchess Kate hits the big 3-0 on Monday, and rumour has it that sister Pippa Middleton has been put in charge of making sure its a birthday to remember. Well, she is a party planner, after all...

According to Grazia magazine, Pippa - with a little help from Prince Harry - is organising a 'secretly-arranged' 80s-themed birthday bash, in tribute to the decade in which the Duchess was born.