Big from 'Rob & Big' dead at just 45

Christopher 'Big Black' Boykin, who was the other half of Rob Dyrdek's hit MTV show "Rob & Big" has died according to TMZ.

TMZ has said there is no official cause that has been determined, but those close to “Big Black” believe he passed away from a heart attack.

Big was Rob's best friend and bodyguard on their TV show, which ran from 2006 to 2008 and Big also appeared on 'Fantasy Factory.' 

Before he was a TV star, Boykin served in the U.S. Navy.

Chris has left behind a 9-year-old daughter.

He was 45.