Dame Emma Thompson wrote Prince William a "fan letter" after he presented her with her damehood.
The 62-year-old actress was given her title in the 2018 Birthday Honours and she heaped praised on how "absolutely fantastic" the 38-year-old royal was at the investiture ceremony, even though he turned down her approach for a kiss.
Appearing via video link on "The Jonathan Ross Show", she said: "Prince William was absolutely fantastic. I wrote him a fan letter afterwards.
"His face and body language, so kind and generous to every single person. I've known him since he was little really. I've always liked him.