Fergie says royal wedding snub was 'difficult'

Chicago: Sarah Ferguson tells Oprah Winfrey it was "difficult" not to be invited to last month's royal wedding of Prince William and Kate Middleton.

The Duchess of York says in an interview scheduled to air Wednesday on "The Oprah Winfrey Show" that she instead went to Thailand. Ferguson says she wanted to be with her daughters, who attended the wedding with their father and Ferguson's former husband, Prince Andrew.

Ferguson also told Winfrey she believes Prince William's mother, the late Princess Diana, "would be so proud of her son."

Ferguson is to have a show on Winfrey's new cable station, OWN. Winfrey is ending her talk show this month after 25 years.

Last May, Ferguson talked to Winfrey about being caught on video offering access to Prince Andrew for $724,000.