Buckingham Palace had no comment or clarification on the queen's remarks.
"If we’re not careful we’re robbing from our children’s future through what we do now," the Duke of Cambridge said.
The 95-year-old monarch has not held an engagement there since the start of the COVID-19 pandemic.
Sophie, Countess of Wessex, first publicly spoke about menopause — and her own experience with it — in May.
The actor also said he offered to babysit for the Duke and Duchess of Cambridge.
“Not that my opinion matters!” Stewart, who will portray the Princess of Wales in the upcoming film "Spencer," said.
The Duke of Edinburgh died in April at the age of 99.
Mapelli Mozzi already has a son, Christopher Woolf, from a previous relationship.
The acknowledgment was confirmed in a joint agreement signed by a lawyer for the British prince.
Sir Ken Olisa, the first Black Lord-Lieutenant for London, said race is a "hot conversation topic" in the royal household.