Oscars organisers used a picture of a woman who's still alive during their "in memoriam" segment, which honours members of the film industry who've died recently.

Janet Patterson, an Australian costume designer and four-time Oscar nominee, died last year.

While she was correctly credited in the text, the picture was of "friend and long-time collaborator" Jan Chapman.

Jan Chapman is a film producer who is still "alive and well".

"I was devastated by the use of my image in place of my great friend and long-time collaborator Janet Patterson," she said in an email to Variety.

"I had urged her agency to check any photograph which might be used and understand that they were told that the Academy had it covered.

"Janet was a great beauty and four-time Oscar nominee and it is very disappointing that the error was not picked up.

"I am alive and well and an active producer."

Janet Patterson designed costumes for a variety of period films including Far From the Madding Crowd, Bright Star, The Portrait of a Lady and The Piano.

"She's not here any more, but she lives on through those beautiful clothes and images," said Nicole Kidman, when news of her death was announced.

At the time, her family asked for her age and date of death to be kept private.

Garry Shandling, Robert Vaughn, Dan Ireland and Doris Roberts were also missed out of the "in memoriam" segment.

Headlines from the Oscars ceremony were dominated by another mistake, as the best picture award was wrongly given to La La Land.

Acceptance speeches had already begun when the error was revealed.

Moonlight eventually was crowned the correct winner.

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