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Jada Pinkett Smith and Spike Lee say they won’t attend or watch the Oscars this year because of the failure to nominate a single nonwhite actor — but sources say host Chris Rock will not pull out of the gig despite mounting pressure.

For the second year in a row, all the acting nominees in Hollywood’s most important awards competition are white. Smith, whose husband, Will Smith, starred in “Concussion,” said to Rock in a video posted to Facebook: “Chris, I will not be at the Academy Awards, and I won’t be watching, but I can’t think of a better man to do the job at hand this year than you, my friend. Good luck.”

She’d earlier posted: “At the Oscars . . . people of color are always welcomed to give out awards . . . even entertain, but we are rarely recognized for our artistic accomplishments . . . Should people of color refrain from participating all together?”

Rock posted a joke on Twitter: “The #Oscars. The White BET Awards.” That drew responses including, “You have a chance to send a strong message! What would MLK do? Not host,” and, “Why not stand up and refuse to host instead of making jokes?”

And a source told website Naughty Gossip that “behind the scenes Chris is under extreme pressure to pull out. Many leaders in the black community think he would help progress be made if he quits his hosting job.”

However, “Chris is listening to what they have to say, but thinks he will have a bigger impact by doing the show. He thinks it is easier to make a difference from the inside. Chris has already started to write white people jokes for the show.”

A rep for Rock did not respond to Page Six’s request for comment.

Lee received an honorary Oscar at November’s Governors Awards. He posted on Instagram Monday, under a pic of Martin Luther King Jr., that he and his wife would not attend the awards show on Feb. 28.