Taking to Instagram, Dunham, 30, said that she loves her body and does not care what others think of her.
"I feel I've made it pretty clear over the years that I don't give even the tiniest of what anyone else feels about my body. I've gone on red carpets in couture as a size 14. I've accepted that my body is an ever changing organism, not a fixed entity - what goes up must come down and vice versa.
"I smile just as wide no matter my current size because I'm proud of what this body has seen and done and represented. Chronic illness sufferer. Body-shaming vigilante. Sexual assault survivor," Dunham wrote.