She explained how she couldn't understand why Meghan and Prince Harry were being given such a hard time.
“Everything they do, they step outside their house and it is something.
“I don’t now why they’re so mean to a fellow human being.
“It always strikes me as odd.”
When asked her opinion on the Sussexes choosing to spend the Christmas holidays with Meghan's mum, Doria Ragland, rather than the rest of the royal family, Olivia said she thought they had good reason to.
“Everyone wants a little Christmas on their own every now and again,” she said.
The new series of The Crown will be out on November 17.
Season three begins in 1964 and covers the Queen’s Silver Jubilee, the moon landing and Prince Charles’s relationship with Camilla.