Warren Beatty and Fay Dunaway have made one of the biggest blunders it’s possible to make, in the world’s brightest spotlight.

Announcing the winner of Best Picture Oscar at the Academy Awards, the Bonnie and Clyde stars opened the envelope and Dunaway announced that La La Land had taken the prize.

Except that it hadn’t. Dunaway and Beatty apparently had wrong envelope, and Moonlight was the correct winner.

Unfortunately, La La Land’s stars were already on stage, giving their acceptance speeches, when the mistake became apparent.

Beatty then returned to the stage and had to force his way through La La Land’s cast to deliver the embarrassing admission.

Oscars host Jimmy Kimmel also came back onto the stage to help sort out the confusion, saying it was a “really unfortunate” mistake.

Beatty explained that the envelope he opened said ‘Emma Stone, La La Land’ – Stone won Best Actress for her role in the film – and that he suspected he had the wrong envelope.

“That’s why I looked at Faye for a really long time,” Beatty said. “I wasn’t trying to be funny.”

WATCH: ‘La La Land’ announced as #Oscars Best Picture winner, but only until a mistake is realized with ‘Moonlight’ being the real winner. pic.twitter.com/wYsUngcdwe

— ABC News (@ABC) February 27, 2017

Watch more here:

And the Academy Award for Best Picture ACTUALLY goes to… Moonlight! #Oscars pic.twitter.com/fubHaRH7Ds

— Channel 9 (@Channel9) February 27, 2017

Here is the whole list of winners here:

Best Picture

“Moonlight” – Adele Romanski, Dede Gardner, and Jeremy Kleiner

Best Director

Damien Chazelle –”La La Land”

Best Actor

Casey Affleck –”Manchester by the Sea” as Lee Chandler

Best Actress

Emma Stone –”La La Land” as Mia Dolan

Best Supporting Actor

Mahershala Ali –”Moonlight” as Juan

Best Supporting Actress

Viola Davis –”Fences” as Rose Maxson

Best Original Screenplay

“Manchester by the Sea” – Kenneth Lonergan

Best Adapted Screenplay

“Moonlight” – Barry Jenkins and Tarell Alvin McCraney from “In Moonlight Black Boys Look Blue” by Tarell Alvin McCraney

Best Animated Feature Film

“Zootopia” – Byron Howard, Rich Moore, and Clark Spencer

Best Foreign Language Film

“The Salesman” (Iran) in Persian – Asghar Farhadi

Best Documentary – Feature

“O.J.: Made in America” – Ezra Edelman and Caroline Waterlow

Best Documentary – Short Subject

“The White Helmets” – Orlando von Einsiedel and Joanna Natasegara

Best Live Action Short Film

“Sing” – Kristóf Deák and Anna Udvardy

Best Animated Short Film

“Piper” – Alan Barillaro and Marc Sondheimer

Best Original Score

“La La Land” – Justin Hurwitz

Best Original Song

“City of Stars” from”La La Land” – Music by Justin Hurwitz, Lyric by Benj Pasek and Justin Paul

Best Sound Editing

“Arrival” – Sylvain Bellemare

Best Sound Mixing

“Hacksaw Ridge” – Kevin O’Connell, Andy Wright, Robert Mackenzie, and Peter Grace

Best Production Design

“La La Land” – David Wasco and Sandy Reynolds-Wasco

Best Cinematography

“La La Land” – Linus Sandgren

Best Makeup and Hairstyling

“Suicide Squad” – Alessandro Bertolazzi, Giorgio Gregorini, and Christopher Nelson

Best Costume Design

“Fantastic Beasts and Where to Find Them” – Colleen Atwood

Best Film Editing

“Hacksaw Ridge” – John Gilbert

Best Visual Effects

“The Jungle Book” – Robert Legato, Adam Valdez, Andrew R. Jones, and Dan Lemmon