The Duchess of York Sarah Ferguson has not be invited to Prince William and Kate Middleton's wedding, RadarOnline.com has learned.

Even though a whopping 1900 guests have their invites in the mail, Fergie was not one of them.

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Her daughter, Princesses Beatrice and Eugenie, will be among the lucky attendees, People is reporting. The girls grew up close to their cousins William and Harry, despite the scandalous divorce 15 years ago of their parents Fergie and Prince Andrew.

Fergie is continuing to work on her upcoming series, Finding Sarah, for OWN, a show that as RadarOnline.com previously reported, has had its premiere postponed.  The six-parter is now on calendar for summer, weeks after the royal wedding.

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The TV show that was supposed to be Sarah Ferguson's big comeback has been delayed at OWN, RadarOnline.com has learned.

Oprah Winfrey, who is extremely hands-on with every program her new network has launched, is said to have found the footage disappointing in how little it revealed about the Duchess of York.

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"Oprah isn't happy with the show.  She found parts of it boring," a source tells the UK's Mail on Sunday.

Last September, Oprah announced that Finding Sarah, a six-part series, would premiere in the spring. While denying that Oprah thinks the show is "boring," a network rep did confirm it has been put back.  "As of now we're anticipating that it will premiere in the summer," the spokesperson said.

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Sarah and Prince Andrew divorced nearly 15 years ago following the publication of photos of a topless duchess having her toes sucked by another man.  She's attempted numerous careers since then, including being a celebrity spokeswoman for Weight Watchers and writing children's books.

But she was admittedly flat broke last year when she was caught in an on-camera sting trying to sell a businessman access to her former husband in return for $500,000.

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That's when Oprah seemingly came to her rescue with an offer for a TV series that was intended to rehabilitate Sarah's image.

If and when the show sees air, it will be after the April 29 wedding of Sarah's nephew Prince William to Kate Middleton.

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At least she has some good news on that front.  Sarah and her two daughters -- William's cousins -- are reportedly being invited to the ceremony.

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