Diesel was born Mark Sinclair on July 18, 1967, in Alameda County, California, with his fraternal twin brother, Paul. His mother, Delora Sherleen Vincent (née Sinclair), is an astrologer. Diesel has stated that he is "of ambiguous ethnicity". His mother has English, German, and Scottish roots. He has never met his biological father, and has stated that "all I know from my mother is that I have connections to many different cultures". Diesel has self-identified as "definitely a person of color", and has stated that his parents' relationship would have been illegal in parts of the United States due to anti-miscegenation laws. He was raised in New York City by his Caucasian mother and African-American stepfather, Irving H. Vincent, an acting instructor and theater manager.