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, Lady wider Willen (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).