The 63-year-old will be filming for The Kelly Clarkson Show on Thursday 2 March, which is based in Universal City, California.
WATCH: Sarah Ferguson arriving at Harry and Meghan's royal wedding
It comes as Sarah also confirmed she will discuss her latest book at the 92nd Street Y in New York on Monday 6 March, as she unveiled a new look on her Instagram account.
Having archived all of her previous posts, new images show close-up shots of ladies taking afternoon tea, in a nod to her new Victoria historical romance novel.
Keeping in with the theme, Sarah also shared a new portrait where she could be seen wearing a pink blazer and gazing off-camera.
Sarah has unveiled a new look to her Instagram account
The Duke of Sussex recalled introducing his then-girlfriend Meghan Markle to members of the royal family in his memoir, Spare, which was released in January – including his aunt Sarah.
Sarah attended Harry and Meghan's royal wedding in 2018
He revealed that "Fergie," as he referred to Sarah in his book, demonstrated to Meghan how she should curtsy to Harry's grandmother, the Queen, before they met for the first time at Windsor.
Sarah is set to be a grandmother for a third time this year, as Eugenie is expecting her second child with Jack Brooksbank.
The Duchess is already granny to Eugenie and Jack's two-year-old son, August, as well as Princess Beatrice and Edoardo Mapelli Mozzi's 18-month-old daughter, Sienna.
LISTEN: Diana's reaction when her plane plunged 10,000ft in terrifying moment
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