Question: Who won the best actor award for the oscars?

Disambiguated questions and answers:
context: Gary Leonard Oldman (born 21 March 1958) is an English actor and filmmaker. He is the recipient of numerous accolades, including an Academy Award, three BAFTA Awards, two Critics' Choice Awards, a Golden Globe Award and a Screen Actors Guild Award. Known for his versatility and intense acting style, Oldman is regarded as one of the greatest actors of his generation.
question: Who won the best actor award for the 2017 oscars?
short_answers: Gary Oldman
Gary Leonard Oldman
wikipage: Gary Oldman
context: No context provided
question: Who won the best actor award for the 2016 oscars?
short_answers: Caleb Casey McGuire Affleck-Boldt
Casey Affleck
context: No context provided
question: Who won the best actor award for the 2015 oscars?
short_answers: Leonardo Wilhelm DiCaprio
Leonardo DiCaprio
context: No context provided
question: Who won the best actor award for the 2017 Oscars?
short_answers: Gary Oldman
context: No context provided
question: Who won the best actor award for the 2016 Oscars?
short_answers: Casey Affleck
context: No context provided
question: Who won the best actor award for the 2015 Oscars?
short_answers: Leonardo DiCaprio

Long-form answers:
knowledge: content: He won the Academy Award for Best Actor for his role as Winston Churchill in Darkest Hour (2017), and was also nominated for his portrayals of George Smiley in Tinker Tailor Soldier Spy (2011) and Herman J. Mankiewicz in Mank (2020).
wikipage: Gary Oldman
content: In his final role of 2016, Affleck starred as Lee Chandler, a grief-stricken alcoholic loner, in Kenneth Lonergan's drama Manchester by the Sea.
wikipage: Casey Affleck
long_answer: Leonardo Wilhelm DiCaprio, Caleb Casey McGuire Affleck-Boldt, and Gary Leonard Oldman, won the best actor award at the Oscars in 2015, 2016 and 2017, respectively. Gary Oldman won for his role as Winston Churchill in 2017. Casey Affleck won for  a grief-stricken alcoholic loner in 2016 and Leonardo DiCaprio won in 2015.
knowledge: content: The Academy Award for Best Actor is an award presented annually by the Academy of Motion Picture Arts and Sciences (AMPAS).
wikipage: Academy Award for Best Actor
content: At age 29, Adrien Brody became the youngest actor to win this award for The Pianist (2002), while Anthony Hopkins, at age 83, became the oldest winner for The Father (2020). As of the 93rd Academy Awards, Hopkins is the most recent winner in this category for his portrayal of Anthony in The Father.
wikipage: Academy Award for Best Actor
content: The film stars Rami Malek as Mercury, with Lucy Boynton, Gwilym Lee, Ben Hardy, Joe Mazzello, Aidan Gillen, Tom Hollander, Allen Leech and Mike Myers in supporting roles.
wikipage: Bohemian Rhapsody (film)
content: Bohemian Rhapsody received numerous accolades, including a leading four wins at the 91st Academy Awards for Best Actor (Malek), Best Film Editing, Best Sound Editing and Best Sound Mixing; it was also nominated for Best Picture.
wikipage: Bohemian Rhapsody (film)
content: The 92nd Academy Awards ceremony, presented by the Academy of Motion Picture Arts and Sciences (AMPAS), honored films released in 2019 and took place on February 9, 2020, at the Dolby Theatre in Hollywood, Los Angeles, beginning at 5:00 p.m. PST / 8:00 p.m. EST.
wikipage: 92nd Academy Awards
content: As a result of Joaquin Phoenix winning Best Actor for his performance as the titular character in the film Joker, he and Heath Ledger, who previously won for playing the same character in 2008's The Dark Knight, became the second pair of actors to win for portraying the same character in two different films.
wikipage: 92nd Academy Awards
long_answer: There have been a number of Best Actor Award winners at the Oscars. As of the 93rd Academy Awards, Anthony Hopkins is the most recent Academy Award for Best Actor winner. Joaquin Phoenix won Best Actor at the 92nd Academy Awards, and Rami Malek won Best Actor at the 91st Academy Awards. Previous winners of the Best Actor Award include Gary Oldman at the 2017 Oscars, Casey Affleck at the 2016 Oscars, and Leonardo DiCaprio at the 2015 Oscars.