The Claimant is the infant son of his litigation friends, Dr Neil Murray and Mrs Joanne Murray (who is better known as J.K Rowling, the author of the Harry Potter series of books). He was born on 23 March 2003. His parents also have a daughter, Mackenzie, who was born on 23 January 2005 and Mrs Murray has a daughter, Jessica, by a previous marriage who was born on 27 July 1993.

http://www.bailii.org/ew/cases/EWHC/Ch/2007/1908.html