Several attendees, including Billie Eilish and Finneas, best song nominees for "What Was I Made For?" from "Barbie," wore pins for Gaza. Ava DuVernay and Ramy Youssef were also among those wearing pins.
The pins were handed out by a group called Artists4Ceasefire.
RELATED: Ramy Youssef calls for a cease-fire in Gaza on the red carpet at the Oscars
Nearby the Oscars at the Cinerama Dome, demonstrators have lined the streets to protest and call for a cease-fire in Los Angeles.
MORE: Protest at Oscars over Israel's war in Gaza snarl traffic outside Academy Awards
The Oscars, kicking off on ABC at 7 p.m. EDT Sunday, are springing forward an hour earlier than usual due to daylight saving time. But aside from the time shift, this year's show is going for many tried-and-true Academy Awards traditions. Jimmy Kimmel is back as host. Past winners are flocking back as presenters. And a big studio epic is poised for a major awards haul.
The Associated Press contributed to this report.