American actor Sean Penn, who recently visited Kyiv, wrote a letter in support of the Ukrainians, Andriy Yermak, head of the President's Office, said.

"When the Russians are trying to fight Facebook … We are fighting, including with the help of Facebook. I will act as an official platform for posting very important words of support. American actor Sean Penn sent me this letter and said that I could publish it wherever I want. I want to publish it here. We are grateful to Sean Penn, who was in Kyiv the other day, a very brave and honest person," Yermak wrote on Facebook.

He published the text of the letter of the actor, who said that Russian President Vladimir Putin is making a terrible mistake.

"Already a brutal mistake of lives taken and hearts broken, and If he doesn't relent, I believe Mr. Putin will have made a most horrible mistake for all of humankind. President Zelensky & the Ukrainian people have risen as historic symbols of courage & principle. Ukraine is the tip of the spear for the democratic embrace of dreams. If we allow it to fight alone, our soul as America is lost," the actor wrote.