- Was a member of an amateur theatre company, The Dog Company. Other members included Clive Barker, Doug Bradley and Mary Roscoe.
- Directed daughter Bel Parker in St. Trinian's (2007) and St Trinian's 2: The Legend of Fritton's Gold (2009).
- Directed father, former British Rail chairman Sir Peter Parker, in An Ideal Husband (1999).
- Good friends with Clive Barker.
- He directed his younger brother Nathaniel Parker in four films: Othello (1995), Fade to Black (2006), I Really Hate My Job (2007) and St. Trinian's (2007).
- Has directed three films based on works by Oscar Wilde: An Ideal Husband (1999), The Importance of Being Earnest (2002) and Dorian Gray (2009).
- Frequently casts Rupert Everett. Everett appears in his films An Ideal Husband (1999), The Importance of Being Earnest (2002), St. Trinian's (2007) and St Trinian's 2: The Legend of Fritton's Gold (2009).
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