These famous celebrities have a special message for the ones struggling with mental illness 

That same month, Lili Reinhart opened up about her depression in a series of honest tweets.

"Riverdale" came into my life when I was going through the worst depression I had ever experienced," the actress wrote. "And in the end it completely saved me."

The 21-year-old star, who called mental health "a priority," continued with a positive message for her followers: "To anyone out there who feels depressed or hopeless ... do not f------ give up on yourself. You're all you've got. And you deserve the world ... You will get through whatever you're going through now. And you'll be so much stronger at the end of it. You're stronger than you know."

Despite the prevalence and global impact of mental health conditions, it's still hard to open up and ask for help when you most need it. Research shows that harmful stereotypes about mental illness often prevent people from seeking treatment or speaking out at all.

Luckily, in recent years, we've seen a shift in the way people view and talk about mental health. Conversations about depression, anxiety, addiction, and more have moved from the private to the public sphere — and that's not only important, but effective, according to mental health experts.

In fact, when public figures open up about their own mental health struggles, it can help break down stigma, spark important discussions, and even inspire people to seek treatment.

Below, we rounded up 23 celebrities who have talked candidly about their own battles with everything from postpartum depression to anorexia.

Prince Harry spoke to a therapist about his mental health after two years of "total chaos" in his late twenties.

In April, the recently engaged Prince told The Telegraph that he "shut down all his emotions" for almost two decades after the death of his mother, Princess Diana. It wasn't until he was 28 years old — during a period of time when he felt "very close to a complete breakdown" and faced anxiety during royal engagements — that he began to see a professional to address his grief.

Now 33 and "in a good place," Harry has encouraged others to open up about their own struggles. In 2016, he started the Heads Together campaign with Prince William and Kate Middleton to help "end the stigma around mental health issues."

"The experience that I have is that once you start talking about it, you suddenly realize that actually, you're part of quite a big club," he told The Telegraph.

After sustaining several serious injuries his freshman year of college, Dwayne "The Rock" Johnson experienced his "first of three depressions."

"I didn't know what it was," he revealed in an interview with The Hollywood Reporter in 2014. "I didn't know why I didn't want to do anything. I had never experienced anything like that."

Johnson later shared what helped him cope. "I found that, with depression, one of the most important things you could realize is that you're not alone," the actor said on an episode of "Oprah's Master Class" in 2015. "You're not the first to go through it. You're not going to be the last to go through it ... I wish I had someone at that time who could just pull me aside and [say], 'Hey, it's gonna be OK. It'll be OK.'"