Christopher "Big Black" Boykin died on Tuesday morning at 45, TMZ is reporting.

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Boykin was known for being half of the titular duo on MTV's Rob & Big, which ran on the network from 2006-2008. The reality show followed professional skateboarder Rob Dyrdek and Boykin, his bodyguard/best friend, as they got into antics in their daily life.

Boykin's cause of death is not yet known. He is survived by his 9-year-old daughter.