Jonathan Winters died at the age of 87 on Thursday evening, according to multiple news reports citing Winters' business associate Joe Petro III.
Here's more from Reuters:
"Joe Petro, a long-time friend of the actor who runs his official website, said Winters died of natural causes at his home in Montecito, California."
Winters appeared in dozens of films and TV series, including It's a Mad, Mad, Mad, Mad World, The Loved One, and The Russians Are Coming, The Russians Are Coming. He also played Robin Williams' son on Mork & Mindy.
Slate's "Brow Beat" has a full obituary for Winters, here.