An Oscar nominee is boycotting this weekend's ceremony, after learning that producers have cut her song from the event.

Transgender performer Anohni has been nominated in the Best Original Song category for 'Manta Ray', but hasn't been invited to perform the track on the night.

Fellow nominee 'Simple Song #3', performed by South Korea's Sumi Jo, has also been snubbed from the evening's entertainment, but Lady Gaga ('Til It Happens to You'), Sam Smith ('Writing's on the Wall') and The Weeknd ('Earned It') will all be giving live performances.

Anohni said she felt it was "degrading" to be treated this way by the Academy, especially as non-nominee Dave Grohl has been invited to perform.

"I want to be clear - I know that I wasn't excluded from the performance directly because I am transgendered," she wrote in her blog. "I was not invited to perform because I am relatively unknown in the US, singing a song about ecocide, and that might not sell advertising space.

"But if you trace the trail of breadcrumbs, the deeper truth of it is impossible to ignore. Like global warming, it is not one isolated event but a series of events that occur over years to create a system that has sought to undermine me, at first as a feminine child and later as an androgynous transwoman.

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"It is a system of social oppression and diminished opportunities for transpeople that has been employed by capitalism in the US to crush our dreams and our collective spirit."

Anohni later said: "In the United States, it is all about money: those who have it and those who don't. Identity politics are often used as a smokescreen to distract us from this viral culture of wealth extraction. When we are not extracting wealth from nature, we are extracting it from the working and middle classes.

"So I have decided not to attend the Academy Awards this election year."

This year's Academy Awards has also been plagued with controversy over diversity, after every single acting nominee is white for the second year running.