"Oppenheimer," Christopher Nolan's epic take on the father of the atomic bomb, was the big winner at Sunday night's Academy Awards.

The film won seven Oscars, including best picture, best director (Nolan), best actor (Cillian Murphy) and best supporting actor (Robert Downey Jr.).

Emma Stone ("Poor Things") won Best Actress for the second time in her career. "Poor Things" also won Oscars for Best Production Design, Best Costume Design and Best Makeup and Hairstyling.

Da'Vine Joy Randolph won best supporting actress for her role in "The Holdovers."

Emma Stone celebrates with presenters after winning the Oscar for best actress. "This is really overwhelming," said the "Poor Things" star while accepting her award. This is Stone's second Oscar for best actress. She also won in 2017 for "La La Land." 

Cillian Murphy celebrates after winning the Oscar for Best Actor ("Oppenheimer"). "I'm a very proud Irishman standing here tonight," he said. 

Comic Guillermo Rodriguez raises a margarita and threatens to toast everyone in the audience during the show. He thanked "his wife" Charlize Theron (not his wife), who appeared shocked when he mentioned her. 

Robert Downey Jr. poses in the press room with the Oscar he won for best supporting actor. "I'd like to thank my terrible childhood and the Academy," he said in his acceptance speech. "In that order." 

Ukrainian director Mstyslav Chernov accepts the Oscar for best documentary feature film ("20 Days in Mariupol"). "Probably I will be the first director on this stage who will say, 'I wish I never made this film,' " Chernov said. "I wish to be able to exchange this (for) Russia never attacking Ukraine, never occupying our cities." 

Gosling and Emily Blunt were in competitive mode while on stage together during the show. They exchanged playful barbs over their their films "Barbie" and "Oppenheimer." Mike Blake/Reuters

Cena presents the Oscar for Best Costume Design. During the bit, show host Jimmy Kimmel coaxed Cena out on stage after Cena had second thoughts about streaking across stage. "Costumes are so important," Cena joked before presenting the Oscar to Waddington and "Poor Things." 

Cord Jefferson accepts the Oscar for best adapted screenplay ("American Fiction"). "I just feel so much joy being here," said Jefferson, who wrote and directed the film. "I felt so much joy making this movie and I want other people to experience that." He called for more filmmakers to be given opportunities to make movies because "the next Martin Scorsese is out there, the next Greta (Gerwig) is out there." 

Members of the Osage Nation pose on the red carpet before the show. Some members of the tribe collaborated with director Martin Scorsese on "Killers of the Flower Moon," a film that recounts a dark and painful chapter of Osage history.