One of the songs on the soundtrack 'Honey to the Bee' sung by Misty Miller, was a huge pop hit in the 1990's for Billie Piper, who plays Birdy's mother in Catherine Called Birdy (2022).
During Robert and Aelis's wedding, Morwenna (Lesley Sharp) can be seen holding a small dog. This is Sharp's real-life dog, Mr. Miggins.
Bella Ramsey, Dean-Charles Chapman, Ralph Ineson, Paul Kaye and David Bradley all previously starred together in Game of Thrones (2011).