Niamh Cusack is an Irish actress best known for her work in both television and theater. Born in 1959 into a prominent acting family, she gained widespread recognition for her role as Dr. Kate Rowan in the TV series Heartbeat. Niamh has also appeared in various stage productions, including Shakespearean roles with the Royal Shakespeare Company and performances at London's West End. Her acting style is celebrated for its emotional depth and versatility.