The youngest brother of Princess Diana, Earl Charles Spencer, married a Canadian philanthropist Karen Gordon.
They tied the knot in a private civil ceremony.
Prince William and Prince Harry were not able to attend the wedding because of previous commitments.
Karen is the third wife of Spencer.
He wed model Victoria Lockwood in 1989 and divorced her in 1997.
He tied the knot with Caroline Freud 2001.
Karen had also a first husband, Hollywood producer Mark Gordon.