Was Joaquin Phoenix nominated for a best actor award?

Yes, Joaquin Phoenix has been nominated for Best Actor several times. He has won one Academy Award for Best Actor for his role in "Joker" (2019). He has also been nominated for his roles in:

* "Gladiator" (2000)

* "Walk the Line" (2005)

* "The Master" (2012)

* "You Were Never Really Here" (2017)

He has also won a Golden Globe Award, a BAFTA Award, and a Critics' Choice Movie Award for his performance in "Joker."