Best Actor 2024 Video. Won the academy award for actor in a supporting role — his first oscar — for his role as lewis strauss in oppenheimer.'downey jr.  — da'vine joy randolph won best supporting actress for the holdovers hollywood's finest have been rewarded with golden statuettes at the oscars in los.

 — christopher nolan’s oppenheimer dominates with seven wins, including best director, best actor for cillian murphy, best supporting actor for robert downey. Robert oppenheimer, who developed the atomic bomb and was haunted by its impact.