Kate Middleton fears walk down the aisle

Kate Middleton is "incredibly nervous" about the prospect of a four minute walk down the aisle to marry Prince William.

The brunette beauty will tie the knot with the future British king in a ceremony at London's Westminster Abbey on April 29 but has decided not to arrive at the venue in an open carriage because she thinks it will be too daunting and wants to concentrate on the walk.

A friend told Vanity Fair magazine: "Kate is incredibly nervous about the four-minute walk up the aisle and she thinks arriving in a carriage and waving to the crowds would just be too nerve-racking. She is worried she might be upsetting some of the courtiers because she's breaking with tradition, but she just wants to do what she feels comfortable with."

Instead, Kate will arrive in a limousine accompanied by her father Michael Middleton.

While they will marry in Westminster Abbey and have a reception at Buckingham Palace for 600 guests - to be hosted by William's grandmother Queen Elizabeth - the couple intend to relax in the evening at a party held by his father Prince Charles although they struggled to cut the guest list down to just 300 people.

An aide said: "It is the golden ticket and is going out at the invitation of H.R.H. the Prince of Wales. William and Kate are allowed 100 guests each, as are Charles and Camilla. It was a nightmare for them trying to get the numbers down."