Calvin Richard Klein Biographical information Date of birth November 19, 1942 Age (1955) 13 Age (1985) 43 Age (2015) 73 Physical description Gender Male Behind-the-scenes information
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"Calvin Klein" was the alias taken by Marty McFly after Lorraine Baines noticed the name on his purple underwear. She assumed it to be Marty's name, but it was actually that of the manufacturer and person who founded the company.

AppearancesEdit

• Back to the Future
• Back to the Future Part II