Complex sentence: Pemberton and Shearsmith lived close to Skinner, but they had not properly met; she was one of several members of the cast of "Life Is Sweet" (others being Alison Steadman and Jane Horrocks) who have starred in "Inside No.9".
Split into simpler sentences: Pemberton and Shearsmith lived close to Skinner, but they had not properly met. She was one of several members of the cast of "Life Is Sweet" (others being Alison Steadman and Jane Horrocks) who have starred in "Inside No.9".