Faye Dunaway speaks on Oscar's best picture fiasco

Faye Dunaway, left, and Warren Beatty present the award for best picture at the Oscars on Sunday, Feb. 26, 2017, at the Dolby Theatre in Los Angeles. (Chris Pizzello/Invision/AP)

NEW YORK -- Actress Faye Dunaway says she thought co-presenter Warren Beatty was joking when he paused before showing her the envelope that should have contained the Oscar's best picture winner.

Dunaway tells Lester Holt on NBC Nightly News she thought Beatty was stalling for effect.

Dunaway read "La La Land" as best picture winner rather than "Moonlight" after PwC partner Brian Cullinan mistakenly handed them the back-up envelope for Actress in a Leading Role instead of the envelope for Best Picture.

She says she read the movie's title on the card but didn't notice Emma Stone's name.

Dunaway says she felt "completely stunned" and later felt guilty because she thought she could have done something to prevent the debacle.

Holt's interview with Dunaway will air Tuesday on the "Today" show.