Sarah Alexander (née Smith; 3 January 1971) is an English actress. She has appeared in British series including Armstrong and Miller, Smack the Pony, Coupling, The Worst Week of My Life, Green Wing, Marley's Ghosts and Jonathan Creek. Sarah Alexander (née Smith; 3 January 1971) is an English actress. She has appeared in British series including Armstrong and Miller, Smack the Pony, Coupling, The Worst Week of My Life, Green Wing, Marley's Ghosts and Jonathan Creek.