Billie Eilish will have an important role at Sunday's 92nd Academy Awards. The 18-year-old singer took to her Instagram the day of the big show to announce that she's performing a cover during the In Memoriam portion of the ceremony.
"Honored to be performing during the In Memoriam segment for the Oscars tonight covering a song I’ve always loved," she wrote.
Eilish is one of the only performers of the night who isn't singing a tune that is nominated for an award. Previously announced performers -- including Elton John, Chrissy Metz, Randy Newman, Idina Menzel and Cynthia Erivo -- are performing tunes nominated for Best Song.
Additionally, the Academy of Motion Pictures Arts and Sciences announced that the show will feature a special musical appearance from Questlove, as well as a special segment guest-conducted by Eímear Noone, who will become the first woman to ever conduct the orchestra during an Oscars telecast.
"I'm dying, man. I don't know, this s**t is crazy. Who am I?" Eilish said with a dazed laugh. "This is surreal. This is like a dream."
Eilish's brother Finneas O'Connell, her producer and collaborator on her wildly successful debut studio album, When We All Fall Asleep, Where Do We Go?, joined his sister backstage and reflected on the wins.
When asked how a person manages to take in a moment like this, O'Connell said simply, "Oh, you don't."
"A couple years from now we'll be like, 'You remember that one time?'" he added with a laugh. "No, you don't take it in. You just thank and hug all of the people."
Eilish addressed Bryant's death on the red carpet ahead of the GRAMMYs, where she told ET, "God, I mean, I don't know how to put it. Thought it was fake because how can you not? It really makes you think about a lot of things."
"It's hard to talk about. It's so sudden and so random and, like, his beautiful girl," she continued. "I have no words. My condolences. I don't know what to say."
This year's Oscars air live from the Dolby Theatre in Hollywood on Sunday, Feb. 9 at 8:00 p.m. ET / 5:00 p.m. PT on ABC.