"Poor Things" won the Oscar for best costume design.

After doing a bit with Jimmy Kimmel about the Oscars streaker at the 46th Oscars in 1974, John Cena presented the award to "Poor Things" costume designer Holly Waddington.

"Thank you to the academy, thank you to my fellow nominees," Waddington began. "It's an amazing privilege to be in the same room as you all. You're the people who inspired me to be a costume designer in the first place."

"'Poor Things' was a very rare opportunity to be really free and artistic in a creative process as a costume designer," she continued. "Thank you, Yorgos [Lanthimos], for that and for making such bold and brave work."

Other nominees in the category included "Barbie," "Killers of the Flower Moon," "Napoleon," "Oppenheimer."

"Poor Things" won the Oscar for best production design, with James Price and Shona Heath taking to the stage to accept the award.

Other films nominated in the category included "Barbie," "Killers of the Flower Moon," "Napoleon" and "Oppenheimer."

"Poor Things" won the Oscar for best makeup and hairstyling.

Nadia Stacey, Mark Coulier and Josh Weston accepted the award. Read more about the team's process while working on the film here.

Other nominees in the category included "Golda," "Maestro," "Oppenheimer" and "Society of the Snow."

Billie Eilish and her brother Finneas O’Connell delivered a moving performance of their Oscar-nominated song “What Was I Made For?” from “Barbie.”

Eilish sang while O’Connell accompanied her on the piano. The duo received a standing ovation from the audience after their performance.

“What Was I Made For?” may earn Eilish and O’Connell their second Oscar tonight. They previously won the Oscar for best original song in 2022 for “No Time To Die” from the James Bond film of the same name.

Robert Downey Jr. won the Oscar for best supporting actor.

The actor won the award for his portrayal of Lewis Strauss in "Oppenheimer."

The award was introduced by previous Oscar winners in the category including Ke Huy Quan, Sam Rockwell, Tim Robbins, Christoph Waltz and Mahershala Ali. They all shared words honoring each nominee before the Oscar was given to Downey.

"Thanks Sam, thanks fellas. You only flubbed one line," Downey joked during his acceptance speech. "I'd like to thank my terrible childhood and the academy, in that order. I'd like to thank my veterinarian -- I mean wife, Susan Downey, over there. She found me, a snarling rescue pet, and you loved me back to life, and that's why I'm here. Thank you."

"Here's my little secret. I needed this job more than it needed me," he continued. "Chris knew it, Emma made sure that she surrounded me with one of the great casts and crews of all time: Emily, Cillian, Matt Damon, Blunt -- it was fantastic. And I stand here before you a better man because of it."

Downey ended his speech by saying, "What we do is meaningful and the stuff that we decide to make is important," before thanking his stylist, entertainment lawyer and others.

This awards season, Downey's role in "Oppenheimer" earned him a Golden Globe for best performance by a male actor in a supporting role in any motion picture and a Screen Actors Guild Award for outstanding performance by a male actor in a supporting role. Downey and the rest of the "Oppenheimer" cast also won a SAG Award for outstanding performance by a cast in a motion picture.

Other nominees in the category included Sterling K. Brown for "American Fiction," Robert De Niro for "Killers of the Flower Moon," Ryan Gosling for "Barbie" and Mark Ruffalo for "Poor Things."