But, unfortunately, sometimes the loudest (and arguably most hurtful) critic happens to be the one inside your head — and quieting the self-deprecating beast can be trickier than silencing a random troll.
Dunham knows the struggle firsthand.
In a heartfelt Instagram post, Dunham admitted that she used to make insulting jokes about her body because she thought if she didn't, someone else would.
At the time, Dunham was struggling with her own body confidence. She revealed she didn't think her figure was "lovable by others," so she turned her body into a joke.
She wrote on Instagram:
"I spent so many years loving my body but thinking it wasn't lovable by others. Its sole purpose was to be fodder for jokes. I performed the insult so no one else could."
But Dunham has come a long way. She understands that she was ultra-critical of her body and has grown to love every inch of herself.
"Now, at age 31, having been through hell and back with my health and other people's perceptions of my physicality, I feel deeply comfortable with the idea that this pear-shaped pot of honey is equally good for making people laugh and laying out like a Suicide Girl circa 2004," she noted.
Due to her battle with endometriosis, Dunham is aware her weight will probably fluctuate throughout her life.
"Right now I'm struggling to control my endometriosis through a healthy diet and exercise," she wrote on Instagram in March. "So my weight loss isn't a triumph."
After years of hiding her insecurities by making jokes about her body, Dunham has finally gotten to a place of true self-acceptance.
Her journey is truly inspiring.