"Oppenheimer" earned seven Oscars from its 13 total nominations, including the top prize of the night, best picture, as well as best director for Christopher Nolan.
In the lead acting categories, "Poor Things" star Emma Stone took home the award for best actress while "Oppenheimer" star Cillian Murphy took home best actor.
ABC's official pre-show, "Countdown to Oscars: On the Red Carpet Live!" will stream on ABC News Live from 1-4 p.m. ET.
As the ceremony inches closer, "High School Musical" alum Vanessa Hudgens and "Dancing with the Stars" co-host Julianne Hough will host a 30-minute pre-show, "The Oscars Red Carpet Show," kicking off at 6:30 p.m. ET on ABC.
Ahead of the show, Kimmel opened up to "Good Morning America" about why he decided to return as host.
"There were some really good movies," he said in an interview that aired March 7. "I think they're all really good. I saw them all."
Jimmy Kimmel sits down for an interview with Lara Spencer ahead of Oscars Sunday.
ABC News
"It's a big part of why I decided to host the show this year, because I do know that there are movies that people have actually seen, which makes it a lot easier to make jokes about."
The talk show host's wife, screenwriter Molly McNearney, also returns as one of the ceremony's executive producers for the second consecutive year.
Kimmel previously hosted the 89th Academy Awards in 2017, the 90th Academy Awards in 2018 and the 95th Academy Awards in 2023.