Her daughters are expected to attend, though Ferguson "never expected to be invited," her spokesperson says

Credit: Charles Eshelman/Getty, Tim Rooke/Rex

As 1,900 invitations to Prince William and Kate Middleton‘s wedding make their way to invited guests across the U.K. and the world, one famous former member of the royal family won’t be getting one.

The Duchess of York, Sarah Ferguson, is to be absent from the April 29 nuptials, PEOPLE has confirmed.

Fergie, 51, will be overseas, her representative says, though she was not anticipating being invited in any case. “She will not be attending. She never expected to be invited,” the spokesman says.

But her daughters, Princess Beatrice, 22, and Princess Eugenie, 20, are expected to attend the ceremony along with friends of the couple, dignitaries, members of other royal families and representatives from charities associated with the prince.

Despite being contacted by media around the world, the Duchess has turned down all offers connected with the wedding itself. “She has declined all commercial work relating to the wedding,” the spokesman says.

Instead, Fergie has been making a special documentary for Oprah Winfrey‘s new network, OWN, which will air later this year.