Warren Beatty has said he wants Academy president Cheryl Boone Isaacs “publicly clarify” what happened during the best picture presentation at Sunday night’s Oscars ceremony.

In what will go down as the biggest gaffe in Oscars history, Beatty and his presenting partner Faye Dunaway mistakenly read out La La Land as the best picture winner, after being given the wrong envelope.

Warren BeattyWarren Beatty (pictured with wife Annette Bening) wants a public clarification from Academy president Cheryl Boone Isaacs

Speaking to the Associated Press, Beatty declined to comment further on the debacle and instead said that Boone Issacs should be making a statement. “I feel it would be more appropriate for the president of the Academy, Cheryl Boone Isaacs, to publicly clarify what happened as soon as possible,” he told AP.

In a statement released on Monday, ceremony organisers apologised to the entire cast and crew of La La Land and Moonlight for the blunder and said that PwC had taken full responsibility for the error.

More: Tweeting PwC Accountant Blamed For Oscars Best Picture Mix-Up

“We apologise to the entire cast and crew of La La Land and Moonlight whose experience was profoundly altered by this error. We salute the tremendous grace they displayed under the circumstances,” the statement read.

“To all involved — including our presenters Warren Beatty and Faye Dunaway, the filmmakers, and our fans watching worldwide — we apologize. For the last 83 years, the Academy has entrusted PwC to handle the critical tabulation process, including the accurate delivery of results.

“PwC has taken full responsibility for the breaches of established protocols that took place during the ceremony,” the statement added. “We have spent last night and today investigating the circumstances, and will determine what actions are appropriate going forward.”