The Emmy-winningRootsactor reportedly died Thursday night in Santa Monica, Calif., his nephew told theAssociated Press.

The cause of death was not revealed.

Entertainment Weeklyhas reached out to representatives for Gossett Jr. for more information.

Actor Louis Gossett Jr. attends the Hollywood Walk Of Fame Honors at Taglyan Complex on October 25, 2016 in Los Angeles, California.

Louis Gossett Jr. dies at 87.Tara Ziemba/Getty

Tara Ziemba/Getty

Gere paid tribute to his former costar in a statement to EW.

Lou was a sweetheart.

He took his job very seriously.

He did his research.

He stayed in character the whole time, said Gere.

I don’t think we ever saw him socially.

He was the drill sergeant 24 hours a day, and it showed clearly in his performance.

He drove every scene he was in.

A tough guy with a heart of gold.

We were all so proud of him when he won his Oscar.

Condolences to his family.

LeVar Burtonremembered his formerRootscostar with a behind-the-scenes photo from the miniseries.

One of the best to ever do it, he wrote of Gossett Jr. onX.

Thank you, Lou… for everything!