Nicole Kidman's new film The Killing of a Sacred Deer features her most disturbing sex scene yet.

The 50-year-old Australian actress strips down for a scene in the Yorgos Lanthimos film, in which her character pretends to be unconscious for her husband, played by Colin Farrell.

The scene finds Kidman and Farrell's husband and wife characters engaging in a bizarre sex ritual in which Kidman's character pretends to have been medically knocked out.

Nicole Kidman with Colin Farrell in The Killing of a Sacred Deer. Photo / supplied
Nicole Kidman with Colin Farrell in The Killing of a Sacred Deer. Photo / supplied

This isn't the first time Kidman has appeared in a disturbing sexual scene, either.

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Kidman appeared in explicit and violent scenes earlier this year in the HBO miniseries Big Little Lies, for which she won an Emmy and has just picked up a Golden Globe nomination.

The Killing of a Sacred Deer finds Farrell playing a surgeon whose idyllic family life is upended when he takes a sinister teenage boy under his wing.

It is in cinemas now.