Sarah Ferguson will not be present when her nephew Prince William marries Kate Middleton.
The Duchess of York's daughters Princesses Beatrice and Eugenie will attend, but their mother has been left off the guest list.
"She will not be attending the wedding," says a rep.
"She never expected to be invited or to attend. She will be overseas at the time."
The flame-haired royal has received many offers to work on TV coverage of the royal wedding. But she has declined all offers.
"She won't be involved in any commercial work in any way surrounding the wedding," says the spokesperson.