Four new series regulars join Prime Video's Young Sherlock Season 2

Olivia Williams, Sophie Skelton, Indira Varma and Aidan Gillen have joined Prime Video's Young Sherlock as series regulars for Season 2, per Deadline (29 July 2026). Character details remain under wraps. Season 2 is in production in Palermo, with Guy Ritchie directing episode one. Three Season 1 cast members — Zine Tseng, Joseph Fiennes and Numan Acar — will not return.