Rob And Big

“Rob & Big” star Christopher (Big Black) Boykin died Tuesday. He was 45. The MTV personality died of a heart attack, his rep told People.

Boykin and his best friend, skateboarder Rob Dyrdek, starred in their eponymous MTV reality show from 2006 to 2008.

The Mississippi native was also Dyrdek’s bodyguard, and the series followed their adventures, from holding an exorcism to breaking Guinness world records, including eating the most powdered doughnuts eaten in less than 3 minutes.

Boykin also appeared on Dyrdek’s other MTV shows, including Ridiculousness and Rob Deryk’s Fantasy Factory.

“My heart is broken,” Dyrdek tweeted late Tuesday night. “I don’t want write this post. I don’t want to believe that this is reality. I am so thankful for you.”