The man responsible for the Oscars mix up was tweeting just before the incident.

It is thought Brian Cullinan - who was one of the people given the responsibility to hand the Academy Award presenters the correct envelope - got distracted backstage at the glitzy bash on Sunday (26.02.17) causing Warren Beatty and Faye Dunaway to be handed the wrong card and mistakenly announce 'La La Land' had won the coveted Best Picture prize instead of actual winners 'Moonlight'.

A tweet - which has now been deleted - was posted just three minutes before the mix-up occurred and was a photo of Emma Stone, who had just won the Best Actress In A Leading Role award, moments after she came off stage.

The slip-up happened when the presenting duo Warren and Faye were handed the envelope for Leading Actress rather than Best Picture, causing much confusion and the incorrect film to be announced.

Meanwhile, in a statement, accounting firm PricewaterhouseCoopers (PwC) ''sincerely apologised'' for the mix-up.

They said at the time: ''We sincerely apologise to 'Moonlight', 'La La Land', Warren Beatty, Faye Dunaway, and Oscar viewers for the error that was made during the award announcement for Best Picture.

''The presenters had mistakenly been given the wrong category envelope and when discovered, was immediately corrected. We are currently investigating how this could have happened, and deeply regret that this occurred. We appreciate the grace with which the nominees, the Academy, ABC, and Jimmy Kimmel handled the situation.''

And Brian previously explained how him and Martha prepare for the event to make sure it goes off without a hitch.

He added: ''From a security perspective, we double up everything. That's why there's two of us. We have two briefcases, that are identical, and we have two entire sets of winning envelopes. Martha [L. Ruiz] carries one of those briefcases, I carry the other.

''We go to the show separately with police escorts. I used to think it was for our security, it's really for the briefcase. We take different routes to get there just because of the kinds of things that can happen in L.A. traffic. We want to make sure that no matter what happens, one of us gets there. We've never really had a problem with that.''