Billie Eilish sings on stage at the 2020 Academy Awards held at Dolby Theatre on Sunday (February 9) in Hollywood.

The 18-year-old musician was joined by her brother Finneas, who played the piano for the performance.

Billie sang a cover of The Beatles‘ “Yesterday” for this year’s In Memoriam tribute.

During the show, Billie had a funny reaction to Maya Rudolph and Kristen Wiig singing while presenting. Check it out on Just Jared!

In case you missed it, check out Billie and Finneas‘ red carpet looks from earlier in the night!

Watch Billie and Finneas‘ In Memoriam tribute now…

Florence Pugh hits the red carpet in a tiered dress at the 2020 Academy Awards held at Dolby Theatre on Sunday (February 9) in Hollywood.

The 24-year-old actress ran into her Black Widow co-star Scarlett Johansson on the carpet, and the two shared a couple of cute moments.

The two ladies were also up for the same award. They were nominated at the ceremony for Best Supporting Actress, but both lost out to Laura Dern.

Black Widow hits theaters on May 1st. Check out the trailer here!

FYI: Florence is wearing head-to-toe Louis Vuitton with a Maria Tash earring.

Eminem took the stage for a performance at the 2020 Oscars at Dolby Theatre on Sunday (February 9) in Hollywood.

The rapper’s appearance was a big surprise as he was not advertised to be in attendance.

Celebrities took to Twitter to react to his shocking performance of his Oscar winning song “Lose Yourself” from 8 Mile. Check it out right here!

“Wait. EMINEM though. That was epic!!!!!! #Oscars2020,” Victoria Justice shared on her account.

While a lot of people were excited for the performance, there was some who were a little upset.

“Guys, I love Eminem but like, even the hip hop moment at the Oscars is white? I just… 🤷🏽‍♀️,” Chrissie Fit wrote on her Twitter.

“Not a racist, Joey. Just VERY into equality and representation. The reason why that was uncomfortable to see is because POC are underrepresented at the Oscars and because of the origins of hip hop,” she added in response to someone’s reply to her. “Oh, and I’ll take your mean words as motivation! Thanks 😘”

Click inside to see more celebrity reactions to Eminem’s surprise performance… More Here! »

Timothee Chalamet takes the stage at the 2020 Academy Awards held at Dolby Theatre on Sunday (February 9) in Hollywood.

The 24-year-old Little Women actor joined Natalie Portman to present the award for Writing – Adapted Screenplay.

While handing the trophy to winner Taika Waititi, Timothee and Taika shared a cute moment. Check it out in the gallery below!

“who’s going to watch tonight ? ☺️,” Timothee wrote on his Instagram hours before the event, along with a cute picture of himself sitting on the floor.

FYI: Timothee is wearing a Prada outfit and a Cartier Tradition brooch from 1955.

The song “Into the Unknown” from Frozen 2 is nominated for Best Original Song at the 2020 Oscars and it was performance at the event on Sunday (February 9) at the Dolby Theatre in Hollywood.

The original Elsa, Idina Menzel, was joined on stage by nine other actresses who voiced the role of Elsa in international versions of the Disney film.

Aurora, who provided the mysterious voice for the song, also joined them on stage.

“Into the Unknown” is nominated for Best Original Song at the Oscars. The song “Let It Go” from the first movie won the Oscar six years ago!

FYI: Idina is wearing a J Mendel dress and Harry Winston jewels.

Saoirse Ronan looks gorgeous while walking the red carpet at the 2020 Academy Awards on Sunday (February 9) at the Dolby Theatre in Hollywood.

The 25-year-old actress is nominated for Best Actress for her work in the movie Little Women and this is the fourth time she has been nominated for an Oscar.

Saoirse was previously nominated for her work in the films Atonement, Brooklyn, and Lady Bird.

Little Women is up for six total awards this evening, including Best Picture and Best Adapted Screenplay for writer Greta Gerwig.

FYI: Saoirse is wearing head-to-toe Gucci.

Billie Eilish is hitting the red carpet ahead of her 2020 Academy Awards performance!

The 18-year-old superstar stepped out for the event on Sunday evening (February 9) at the Dolby Theatre in Hollywood.

PHOTOS: Check out the latest pics of Billie Eilish

Billie was also joined at the event by her brother and producer Finneas, who was accompanied by girlfriend Claudia Sulewski.

During the show, Billie and Finneas are set to give a special performance.

For the second year in a row, the Oscars will be presented without a host. Joker leads the pack with 11 nominations. Tune in for the show at 8pm ET/5pm PT on ABC.

FYI: Billie is wearing Chanel. Claudia is wearing vintage Gucci.