(And, of course, showing her boyfriend, Dom Sherwood, some love by advertising his company.)
But what started as a positive post took a negative turn when Hyland's followers started attacking her for her weight.
Proudly wearing her anti-bullying t-shirt, Hyland posted this Instagram selfie with the intention of spreading positivity.
"Sherwood (and nothing else) looks good on me," Hyland cheekily wrote, tagging her boyfriend. "Buy a shirt and a portion of the proceeds go to the Anti-Bullying Alliance!"
However, the lighthearted promotion unexpectedly brought an overwhelming amount of body-shaming.
Instead of focusing on her anti-bullying mission, Hyland's followers zeroed in on her apparent weight loss.
Haters and fans alike told her to "eat a burger" and accused her of "promoting anorexia."
But Hyland isn't losing weight because she's trying to "get skinny." Her weight loss is a side effect of the medicine she's taking to battle very serious health issues.
Hyland tries not to comment on nasty, untrue rumors — but this time, she felt like she needed to speak out against the body shaming.
"I normally don't comment on things like this because it draws attention to those trying to spread negativity," Hyland began her two-part Twitter response to her body shamers. "But I'm here to explain a few things and spread love."
In an epic, eight-page letter, Hyland confronted the trolls who bullied her for looking "too skinny" in her t-shirt.
"I've been accused of promoting anorexia in, ironically enough, an anti-bullying post," Hyland wrote. "I want young girls to know that that's NOT my intention."
"I posted a picture of my boyfriend's apparel line, in which part of the proceeds go to the anti-bully alliance, and in return, [I] am bullied."
Hyland said the criticisms made her "laugh" at first, but then she realized some of her followers may be struggling with their own appearances.
Hyland didn't want her fans to internalize such negativity.
"[The mean comments] made me laugh, but then it dawned on me that young girls are reading posts that are saying that I'm promoting anorexia due to my weight," Hyland continued. "While these comments don't affect me, they may affect others."
It's sad that a simple photo of Hyland in an anti-bullying t-shirt would lead to intense body shaming.
Word to Hyland's critics: Body shaming = bullying.
A person shouldn't have to write an eight-page essay explaining their weight just to continue existing.