LOS ANGELES - Several Oscar winners took the opportunity to inject politics into Sunday night's festivities, starting with the telecast's first famous victor, A-list heartthrob Brad Pitt, who took a shot at Republican senators who voted against calling witnesses at President Trump’s impeachment trial.
The four-time Academy Award nominee won the best-supporting actor accolade for his role as a stuntman in “Once Upon a Time in Hollywood.” The win marked his first-ever Academy Award win for acting.
He immediately took the stage and got political by taking a jab at senators who voted against Democrats’ requests to call new witnesses in the impeachment trial, specifically former National Security Adviser John Bolton, who claimed he was willing to testify.
“They told me I only have 45 seconds up here, which is 45 seconds more than the Senate gave John Bolton this week,” Pitt said. “I’m thinking maybe Quentin [Tarantino] does a movie about it. In the end, the adults do the right thing.”
No new witnesses were called in Trump’s impeachment trial, for which he was ultimately acquitted by the Senate in a vote across party lines, with the exception of a lone Republican vote to convict coming from Sen. Mitt Romney.
Pitt had been expected to win the category after scooping up a series of honors this year, including at the Golden Globes and Screen Actors Guild Awards.
Speaking backstage, the actor explained why he included a political jab in his Oscars acceptance speech.
"I was really disappointed with this week," he told reporters. "And I think when gamesmanship trumps doing the right thing, it’s a sad day and I don’t think we should let it slide, and I’m very serious about that."
Pitt was not the only actor to politicize his comments as Joaquin Phoenix used his lengthy, emotional best actor acceptance speech to discuss, among other things, the state of humanity, and the plight of cows.
"I think whether we’re talking about gender inequality or racism or queer rights or indigenous rights or animal rights, we’re talking about the fight against the belief, one nation, one race, one gender, or one species has the right to dominate, control and use and exploit another with impunity," the animal-rights activist said.
"We feel entitled to artificially inseminate a cow," Phoenix continued. "And when she gives birth, we steal her baby even though her cries of anguish are unmistakable and then we take her milk that’s intended for her calf and we put it in our coffee and our cereal.“
Even socialist revolutionary Karl Marx was mentioned in a speech by Julia Reichert, the co-director of the Barack Obama-produced Best Documentary winner "American Factory.
"Reichert concluded her speech with a paraphrase of the "Communist Manifesto," written by Marx and Frederich Engels, stating "[W]e believe that things will get better when workers of the world unite.“
Pitt’s politically driven tone was significantly different than previous wins, where he kept it light with jokes and breezy speeches. Pitt was more somber on Sunday, calling his win “incredible” as his peers cheered.
The actor plays the stunt double of an aging cowboy actor played by Leonardo DiCaprio, a best actor nominee, in Quentin Tarantino’s 1969 Hollywood fable.
“‘Once Upon a Time in Hollywood,’ ain’t that the truth,” an emotional Pitt said before he thanked his children, Tarantino and DiCaprio.
“I’ll ride on your coattails any day,” he concluded of his co-star. “The view’s fantastic.”
Get updates on this story foxnews.com. The Associated Press contributed to this report.