Britain's Chief Rabbi Jonathan Sacks speaks at a meeting of religious leaders at St Mary's University College Chapel at Twickenham in west London in this September 17, 2010 file photo. Chief Rabbi Jonathan Sacks is rumoured to be among the 1,900 guests invited to attend the wedding of Britain's Prince William and Kate Middleton on April 29, 2011, according to local media.
 

Pippa Middleton, sister of the fiancee of Britain's Prince William, Kate Middleton, attends the wedding of Katie Percy and Patrick Valentine at Alnwick Castle in Alnwick, northeast England in this February 26, 2011 file photo. Pippa is rumoured to be among the 1,900 guests invited to attend the wedding of
Britain's Prince William and Kate Middleton on April 29, 2011,according to local media.
 

Britain's Princess Eugenie (R) and Princess Beatrice (L) leave after a Christmas Day service at St Mary Magdalene Church on the Royal estate at Sandringham, Norfolk, in east England, in this December 25, 2010 file photo. Princess Eugenie and Princess Beatrice are rumoured to be among the 1,900 guests invited to attend the wedding of Britain's Prince William and Kate Middleton on April 29, 2011, according to local media.