Berbekal lima nominasi yang diraihnya, Green Book berhasil menyingkirkan film-film favorit lain seperti The Favourite, Roma, A Star is Born, dan Bohemian Rhapsody untuk memenangkan Best Picture di ajang The 91^st Annual Academy Awards. Selain memenangkan kategori paling prestisius di ajang penghargaan tersebut, Green Book juga berhasil meraih kemenangan di kategori Best Original Screenplay dan Best Actor in a Supporting Role untuk Mahershala Ali. Kemenangan Green Book, yang hadir tanpa nominasi Best Director, menandai kali kelima sebuah film dapat memenangkan Best Picture tanpa meraih nominasi Best Director mengikuti kemenangan Wings (William A. Wellman, Harry d’Abbadie d’Arrast, 1927), Grand Hotel (Edmund Goulding, 1932), Driving Miss Daisy (Bruce Beresford, 1989), dan Argo (Ben Affleck, 2012).

Meskipun berhasil memenangkan Best Picture, raihan piala Green Book masih mampu diungguli oleh Bohemian Rhapsody. Dari lima nominasi yang diraihnya, Bohemian Rhapsody berhasil memenangkan Best Film Editing, Best Sound Mixing, Best Sound Editing, dan Best Actor in a Leading Role untuk Rami Malek. Bohemian Rhapsody hanya gagal memenangkan kategori Best Picture. Roma, yang diunggulkan di sepuluh kategori, berhasil membawa pulang tiga penghargaan untuk Best Foreign Language Film serta Best Cinematography dan Best Director yang keduanya dimenangkan oleh Alfonso Cuarón. Film lain yang berhasil meraih sepuluh nominasi, The Favourite, hanya mampu membawa pulang satu penghargaan yang dimenangkan Olivia Colman untuk kategori Best Actress in a Leading Role dimana Colman berhasil menyingkirkan pesaing utamanya, Glenn Close (The Wife, 2018), yang sejak awal diprediksi akan memenangkan kategori tersebut.

Berikut daftar lengkap pemenang The 91st Annual Academy Awards:

Best Picture

• Green Book – Jim Burke, Charles B. Wessler, Brian Hayes Currie, Peter Farrelly, and Nick Vallelonga

 Best Director

• Alfonso Cuarón – Roma

 Best Actor

• Rami Malek – Bohemian Rhapsody as Freddie Mercury

 Best Actress

• Olivia Colman – The Favourite as Anne, Queen of Great Britain

 Best Supporting Actor

• Mahershala Ali – Green Book as Don Shirley

 Best Supporting Actress

• Regina King – If Beale Street Could Talk as Sharon Rivers

Best Original Screenplay

• Green Book – Written by Nick Vallelonga, Brian Currie, and Peter Farrelly

Best Adapted Screenplay

• BlacKkKlansman – Charlie Wachtel, David Rabinowitz, Kevin Willmott, Spike Lee

Best Animated Feature Film

• Spider-Man: Into the Spider-Verse – Bob Persichetti, Peter Ramsey, Rodney Rothman, Phil Lord, and Christopher Miller

Best Foreign Language Film

• Roma (Mexico) in Spanish and Mixtec – Directed by Alfonso Cuarón

Best Documentary – Feature

• Free Solo – Elizabeth Chai Vasarhelyi, Jimmy Chin, Evan Hayes, and Shannon Dill

Best Documentary – Short Subject

• Period. End of Sentence. – Rayka Zehtabchi and Melissa Berton

Best Live Action Short Film

• Skin – Guy Nattiv and Jaime Ray Newman

Best Animated Short Film

• Bao – Domee Shi and Becky Neiman-Cobb

Best Original Score

• Black Panther – Ludwig Göransson

Best Original Song

• “Shallow” from A Star Is Born – Music and Lyrics by Lady Gaga, Mark Ronson, Anthony Rossomando, and Andrew Wyatt

Best Film Editing

• Bohemian Rhapsody – John Ottman

Best Cinematography

• Roma – Alfonso Cuarón

Best Sound Editing

• Bohemian Rhapsody – John Warhurst and Nina Hartstone

Best Sound Mixing

• Bohemian Rhapsody – Paul Massey, Tim Cavagin, John Casali

Best Visual Effects

• First Man – Paul Lambert, Ian Hunter, Tristan Myles, and J. D. Schwalm

Best Costume Design

• Black Panther – Ruth E. Carter

Best Production Design

• Black Panther – Production Design: Hannah Beachler; Set Decoration: Jay Hart

Best Makeup & Hairstyling

• Vice – Greg Cannom, Kate Biscoe, and Patricia Dehaney