Gary Oldman wins best actor Academy Award

Gary Oldman's transformation into Winston Churchill for "Darkest Hour" has won him the best actor Academy Award.

It is Oldman's first win on only his second nomination, despite his lengthy career of compelling performances. The 59-year-old had been considered the front-runner for the honor, having swept awards season, AP reports. 

Oldman underwent hours of makeup to become Churchill for the film, which focuses on a pivotal time in the British leader's career when he rallied his country to fight the Nazis. Oldman thanked Churchill in his acceptance speech, as well as those who worked with him on "Darkest Hour."

He also thanked his 99-year-old mother, telling her, "thank you for your love and your support. Put the kettle on. I'm bringing Oscar home."