The Trainwreck star has made no secret of the fact she isn't as slim as other women in Hollywood, but while she is proud of her curves, she was incensed to discover the American publication had labelled her plus-size.

"I think there's nothing wrong with being plus size," she wrote on Instagram on Tuesday (05Apr16). "Beautiful healthy women. Plus size is considered size 16 in America. I go between a size 6 and an 8. @glamourmag put me in their plus size only issue without asking or letting me know and it doesn't feel right to me."

Amy featured in Glamour's special issue in collaboration with plus-size clothing brand Lane Bryant, alongside Bridesmaid actress Melissa MCCarthy and British singer Adele.

But the 34-year-old believes her inclusion promotes the wrong message to the younger generation.

"Young girls seeing my body type, thinking that is plus size?" she continued. "What are your thoughts? Mine are not cool glamour not glamourous."

The publication's editors were quick to issue a statement following Amy's scathing social media post, insisting they never meant to offend her.

"First off, we love Amy, and our readers do too - which is why we featured her on the cover of Glamour last year," they wrote. "The cover line on this special edition - which is aimed at women size 12 and up - simply says "Women Who Inspire Us," since we believe her passionate and vocal message of body positivity IS inspiring, as is the message of the many other women, of all sizes, featured.

"The edition did not describe her as plus-size. We are sorry if we offended her in any way."