Two-time Oscar-winning actor Sean Penn has piled criticism on the Academy ... its refusal to invite the Ukrainian president Volodymyr Zelensky to speak at the 2022 awards show via telecast.

The Oscar winner's two-hour documentary ... "Rarely do you get to be an eyewitness to history as [Sean] Penn did with President Zelensky in his bunker as Russian bombs exploded over Kyiv.