Simplify the following text for a Grade 11 native English-speaking person.
Original: Juan Carlos Antonio Galliano-Guill Ã n , CBE , RDI ( born 28 November 1960 ) , professionally known as John Galliano , is a British fashion designer who was head designer of French haute couture houses Givenchy ( July 1995 to October 1996 ) and Christian Dior ( October 1996 to March 2011 ) .
Simplified: John Galliano , also known as Juan Carlos Antonio Galliano-Guill Ã n ( born on November 28 , 1960 in Gibraltar ) is a world-renowned British fashion designer .