Carrie-Anne Moss - Detective Olivia Neal

Emerald Fennell (season 4, featured season 3) and Olivia Williams (seasons 5-6) - Camilla Parker Bowles

Samantha Kurzman - Young Olivia

Claire Foy (seasons 1–2, featured season 4, guest season 5), Olivia Colman (seasons 3–4), and Imelda Staunton (season 5-6) - Queen Elizabeth II