He was best known for playing Hector Salamanca.

Margolis died Thursday in New York City’s Mt.

Sinai Hospital with his wife Jacqueline and son Morgan at his side.

Mark Margolis attends the screening of “Louisiana Caviar” hosted by The Cinema Society

Mark Margolis.Jim Spellman/WireImage

Morgan, CEO of Knitting Factory Entertainment, first announced the news.

“He was one of a kind,” his manager Robert Kolker of Red Letter Entertainment said.

“He was a treasured client and a lifelong friend.

BREAKING BAD, (from left): Ruben Munoz-Soto, Mark Margolis, Victor Munoz-Soto, ‘One Minute’,

Mark Margolis in Breaking Bad.Ursula Coyote/AMC/Courtesy Everett Collection

I was lucky to know him.”

He later studied under Lee Strasberg and Barbara Loden.

His early career included parts in theatrical productions such asInfidel Caesar, a Broadway show based on Shakespeare’sJulius Caesar.

“He lost a bet.”