The president of the American Film Academy has said the two accountants responsible for the best picture mix-up at Sunday's award ceremony will not work at the Oscars again.

Brian Cullinan and Martha Ruiz were the two PwC auditors privy to the Academy votes and responsible for the presenters' envelopes.

Mr Cullinan handed Warren Beatty the wrong best picture envelope during Sunday night's ceremony, leading to La La Land incorrectly being announced as the winner rather than Moonlight.