George Shapiro, known as the producer of "Seinfeld" and personal manager of Jerry Seinfeld himself, has died.

Shapiro died Thursday of natural causes at his home in Beverly Hills, his publicist told The Hollywood Reporter.

Tributes to the producer and manager poured in on social media. TV writer Norman Lear shared a touching message after learning the news.

"One of the dearest people I have ever known, George Shapiro, just passed," he captioned an Instagram post. "I bless our friendship and, at 99, I'm sure I'll see him relatively soon."

Jerry Seinfeld and George Shapiro on the red carpet

Jerry Seinfeld's personal manager and "Seinfeld" producer George Shapiro has died. (Gary Gershoff)

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"Seinfeld" star Jason Alexander also paid tribute to the producer on Twitter.

"A wonderful man named George Shapiro passed yesterday at age 91," he wrote. "He was a key producer of SEINFELD. But more, his kindness and joyful optimism was a constant reminder to live life fully, gratefully and with as big a smile as possible. Thanks, George."

Shapiro, alongside the late Howard West, brought "Seinfeld" to life. The two were also involved in the production of Seinfeld's "Comedians in Cars Getting Coffee."

The producer also worked on "Summer Rental" and "Summer School."

Howard West, Jerry Seinfeld and George Shapiro at the Las Vegas Convention Center.

Shapiro produced "Seinfeld" alongside the late Howard West. (Mathew Imaging/WireImage)

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Besides Seinfeld, Shapiro also managed others, including Andy Kaufman, Carl Reiner, Marty Feldman and Robert Wuhl.

Shapiro is survived by his brother Don, partner Melody Shapiro and their three children, Danny, Carrie and Stefanie.

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