Joaquin Phoenix is an acclaimed American actor known for his intense and versatile performances. He has received widespread recognition for his roles in films such as "Gladiator," "Walk the Line," "The Master," and "Her." Phoenix is particularly renowned for his portrayal of Arthur Fleck in the 2019 film "Joker," which earned him an Academy Award for Best Actor. His acting style is often characterized by deep emotional depth and a commitment to complex, troubled characters. Beyond acting, Phoenix is also known for his activism, particularly in the areas of animal rights and environmental issues.