Filmmaker Michael Moore hospitalized with pneumonia
Filmmaker Michael Moore addresses the press in Flint, Michigan (Screenshot/Detroit Free Press)

Filmmaker Michael Moore was hospitalized with pneumonia and has cancelled plans to promote his upcoming documentary "Where to Invade Next," even though he said Friday he was doing "much better."

Moore said he was admitted to the intensive care unit of a New York hospital on Sunday, but said he expected to be discharged on Friday.

"Let's just say things didn't look good Sunday night. But thanks to a combination of good doctors, decent hospital food and 2nd-term Obamacare, I'm doing much better," Moore wrote on Facebook.

Moore blamed his illness on an exhausting schedule promoting the film, supporting Democratic presidential hopeful Bernie Sanders, and trying to draw attention to the poisoned water scandal in his hometown of Flint, Michigan.

The guerilla filmmaker enlisted his fans to help promote "Where to Invade Next," set to open Friday, by sharing trailers and forwarding reviews to their friends and family.

"I can't fly, I have to recover, and in one week (February 12th) this great movie I've put so much of my life into is going to open in theaters -- with little or no assistance from me," Moore wrote on Facebook.

"So, would it be OK to enlist your help in a sort of quickly cobbled-together 'army' of grassroots foot soldiers, wherein you could pitch in where you live (and on social [sic] media) to let people know about my movie?"

The Oscar-winning filmmaker is best known for directing documentaries "Bowling for Columbine" (2002), which takes on American gun culture; "Fahrenheit 9/11" (2004), which skewers the Bush administration's response to the terrorist attacks of September 11, 2001, and "Roger & Me" (1989), about his efforts to talk to the head of General Motors about the impact of plant closures in Flint.

In "Where to Invade Next" Moore once again places himself in the action, as a pseudo conqueror who plants the American flag wherever he goes, baffling onlookers.

The movie actually delves little into US military misadventures abroad.

Instead, Moore uses the term "invasion" to mean plundering other nations' notions of happy workers, good education, humane prisons and empowered women.