Jill Biden will attend the coronation of King Charles on behalf of US president Joe Biden at the ceremony held on Saturday May 6.
On Tuesday, Mr Biden called Charles to inform him that he will not be attending the investiture of the new monarch and told him the First Lady will take his place.
The president congratulated him ahead of his coronation, which will be held at Westminster Abbey, and also expressed his desire to meet Charles in the UK at a future date.