Did joaquin phoenix win best actor for joker?

Joaquin Rafael Phoenix is a highly regarded American actor known for playing dark, unconventional characters in both independent and mainstream films. According to the provided Wikipedia excerpt, he has received a wide range of accolades, including an Academy Award, BAFTA Award, and two Golden Globes, among others. While his role as Arthur Fleck in the 2019 film Joker earned him widespread critical acclaim, the evidence supplied does not explicitly state that his Academy Award was awarded for this performance. Therefore, based solely on the verified information, we can confirm that Phoenix has won an Oscar, but we cannot conclusively say that it was for Joker without further evidence.