Sarah Ferguson says the Duke and Duchess of Cambridge are doing an "extraordinary job" for Great Britain.
The Duchess of York - ex-wife of Prince Andrew - is a huge fan of Prince William and Duchess Catherine and think they are carrying themselves off very well.
Speaking about the pair's recent official visit to Asia Pacific, Sarah said: "They are a beautiful couple doing an extraordinary job for Great Britain. Catherine is always full of grace and dignity and she's beautiful - she didn't do anything wrong. They look beautiful and they had a lovely time together and it was so romantic. It's beautiful to see a young couple in love."
Sarah - who has two daughters, Princesses Beatrice and Eugenie, with Andrew - also spoke of her anger about the recent publication of pictures of Catherine sunbathing topless saying it was very "cruel".
Sarah - who had to deal with her own scandalous photo release in 1992 - added to 'Access Hollywood': "It's not just an invasion of privacy, it's also the invasion of her inner space. I've been there. I know what it feels like. There's nothing - it's just so cruel to go to that level.
"Nobody's entitled to that."