Lupita Nyong'o has called out Grazia UK for photoshopping her hair on MZ Generation Horny Sistersthe cover of its latest issue.

The 34-year-old Oscar winner expressed disappointment that the publication "edited out and smoothed my hair to fit a more Eurocentric notion of what beautiful hair looks like."

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Nyong'o also shared a lengthier statement on Instagram, saying that there was still a "very long way to go to combat the unconscious prejudice against black women's complexion, hair style and texture."

She ended both her posts with the hashtag #dtmh (don't touch my hair), which was quickly picked up on Twitter.

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They still doing this in 2017? Do these editors live under a rock? #donttouchourhair

— Ashley Kapri (@iamashleykapri) November 10, 2017

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The hashtag #dtmh was first popularised by Solange Knowles' song, Don't Touch My Hair.

Solange later used the hashtag #dtmh herself when British publication The Evening Standardphotoshopped her braids on the cover of its magazine.

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The paper later apologised, saying the decision to "amend the photograph was taken for layout purposes."

Mashablehas reached out to Grazia UKfor comment.