Marco Williamson  Marco Williamson is an English actor. Williamson is known for his television role as "Julian" in the 1995/6 television adaptation of Enid Blyton's "The Famous Five" shown on HTV from 1995 and on all other ITV regions in 1996–1997. He has also appeared in "Murder Most Horrid" in 1991, in "Richard III" as Edward of York, Prince of Wales in 1995, and most recently in "My Parents Are Aliens" in 2000. On BBC Radio 4, he starred as Eustace Scrubb in the 1997 radio dramatisation of CS Lewis's The Last Battle, opposite Victoria Shalet as Jill Pole and Paul Rhys as King Tirian. Williamson is also an experienced stage actor and has appeared in many productions. He also writes, produces, and directs. His most noted work is "My Amersham".