Jerry Seinfeld Was Planning a Special Project With Joan Rivers

— -- Jerry Seinfeld was planning a special project with Joan Rivers.

Before her Sept. 4 death, Rivers was in talks to appear on Seinfeld’s popular web series “Comedians in Cars Getting Coffee,” Seinfeld revealed in a Facebook post. The series features Seinfeld making coffee trips with friends and entertainment figures.

Seinfeld posted a text message exchange from Aug. 19 – nine days before Rivers underwent a throat procedure – stating that Rivers would love to participate.

READ: What We Know So Far About Yorkville Endoscopy and Rivers' Death

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But days later, her reps called, saying Rivers needed to postpone.

Rivers went into cardiac arrest during surgery Aug. 28 and died days later. She was 81.

Seinfeld was saddened that he didn’t have the chance to take his comedic journey with Rivers.

“I would have loved to have shown another side of her,” Seinfeld wrote Monday. “I wanted to tell her how much I admire all she had accomplished, especially in the latter stages of her career.

“She was one of the greats. I’ll miss her.”