The Oscars paid tribute to those in the entertainment industry who died in the past year during the "In Memoriam" segment.

Michael Gambon, Chita Rivera, Alan Arkin, Julian Sands, Andre Braugher, Glynis Johns, Paul Reubens and Ryan O'Neal were among the stars who were remembered, as well as Mathew Perry, Richard Lewis, Lee Sun-Kyun and Carl Weathers.

During the segment, Andrea Bocelli sang "Time to Say Goodbye" with his son Matteo Bocelli.

“Oppenheimer” won the Oscar for best original score.

Ariana Grande and Cynthia Erivo presented the award to composer Ludwig Göransson. This is his second Oscar win and third nomination.

Upon accepting the award, Göransson thanked director Christopher Nolan for allowing him to collaborate with his wife, acclaimed violinist Serena McKinney.

Other nominees in the category included “American Fiction,” “Indiana Jones and the Dial of Destiny,” “Killers of the Flower Moon,” and “Poor Things.”

Billie Eilish and Finneas O'Connell won the Oscar for best original song.

The sister and brother duo's hit song, "What Was I Made For?" from "Barbie," marked the duo's second Oscar win for best original song. They previously won the award in 2022 for their song "No Time To Die" from the James Bond film of the same name.

During their acceptance speech, Eilish said she felt "so incredibly lucky" and "honored" to take home the award.

"Thank you for this," she said. "I'm so grateful for this song and for this movie and the way that it made me feel, and -- this goes out to everyone who was affected by the movie and how incredible it is."

Other nominees in the category included "The Fire Inside" by Diane Warren from "Flamin' Hot," "I'm Just Ken" by Mark Ronson and Andrew Wyatt from "Barbie," "It Never Went Away" by Jon Batiste from "American Symphony" and "Wahzhazhe (A Song For My People)" by Scott George from "Killers of the Flower Moon."

Ryan Gosling and Mark Ronson took the Oscars stage and delivered an epic performance of "I'm Just Ken" from "Barbie."

During his performance, Gosling was joined by his fellow Kens from the film and got director Greta Gerwig and co-stars Margot Robbie and America Ferrera to join a sing-along from the audience.

The performance also featured Guns N' Roses guitarist Slash, who played on the recorded track.

"I'm Just Ken," which was written and co-produced by Ronson and Andrew Wyatt, is nominated for best original song tonight.

Da'Vine Joy Randolph won the Academy Award for best supporting actress.

Randolph took home the award for her performance as Mary Lamb in director Alexander Payne's "The Holdovers."

During her acceptance speech, she thanked those who believed in her, including her mother.

"God is so good, God is so good," she began. "You know, I didn't think I was supposed to be doing this as a career. I started off as a singer. And my mother said to me, 'Go across that street to that theatre department, there's something for you there.' And I thank my mother for doing that."

"I thank all the people who have stepped in my path and have been there for me, who have ushered me and guided me," she continued. "I am so grateful to all you beautiful people out here. For so long, I've always wanted to be different, and now I realize I just need to be myself. And I thank you. I thank you for seeing me."

The award was introduced by previous Oscar winners in the category, including Jamie Lee Curtis, Lupita Nyong'o, Mary Steenburgen, Rita Moreno and Regina King. They all shared words honoring each nominee before the Oscar was given to Randolph.

Other nominees up for best supporting actor this year included Emily Blunt for "Oppenheimer," Danielle Brooks for "The Color Purple," America Ferrera for "Barbie" and Jodie Foster for "Nyad."