It often feels like celebrities' lives are totally available for public consumption.

The actor’s life changed in an instant, as his treatment became the top priority in his life.

Van Der Beek remained positive, though.

Selena Gomez smiling at a premiere

“I really felt like, ‘This is gonna be the biggest life redirect.

While Van Der Beek isn’t yet in remission, he’s still optimistic about his prognosis.

What further surprised fans was Boseman’s cause of death.

James Van Der Beek smiling at an event

The rest of the announcement proved just how strong Boseman remained throughout his illness.

While Boseman’s death was heartbreaking to many, it was not in vain.

His sickness has raised awareness about colon cancer, a disease that is more prevalent among Black men.

Chadwick Boseman wearing a dark suit at a movie premiere

“I think that was probably the No.

So, awareness definitely increased,” one doctor toldNBC News.

Though she was sharing upsetting news, Fischer did have an uplifting message in that she is cancer-free.

Jenna Fischer posing at an event

“From the beginning, she said, ‘Whatever you need.

I’m here,'” Fischer said on"Today"of Kinsey’s support.

Fischer didn’t want anyone at work to know, so Kinsey kept her secret.

Olivia Munn smiling at an event

“It was amazing,” Fischer said.

Munn had four separate surgeries, including a double mastectomy, to combat the cancer.

The actor’s oldest child was only a year old at the time of her treatment.

Michael J. Fox posing at a benefit

“I decided I was done being insecure about my mastectomy scars.

Michael J.

Fox waited years to share that he has Parkinson’s

But Fox wasn’t always so open.

Selena Gomez wearing a dark, sparkly jacket

“That’s what my break was really about.

I could’ve had a stroke.

I wanted so badly to say, ‘You guys have no idea.

Alan Rickman slightly smiling in a black suit

I’m in chemotherapy.

You’re a**holes,'” she said.

Gomez’s journey with lupus has lasted years.

Cobie Smulders grinning in a sleeveless top

“My highs were really high, and my lows would take me out for weeks at a time … Rickman was diagnosed with prostate cancer in 2005.

However, Rickman eventually decided to continue with the role.

“Finally, yes to HP 5.

Avril Lavigne sticking her tongue out

The sensation is neither up nor down.

The argument that wins is the one that says: ‘See it through.

It’s your story,'” Rickman wrote of his decision, as published byThe Guardian.

Norm Macdonald wearing a baseball cap and smiling

Smulders noted that she had tumors on both of her ovaries and that the cancer had spread.

After two years of various surgeries, doctors managed to remove the cancer from Smulders’ body.

In 2015, Smulders had been in remission for five years.

Michael C. Hall holding a Golden Globe award

Despite the good news, cancer was still on Smulders’ mind.

“I don’t think I’ll ever feel like I’m cancer-free …

I’m trying to think of it as a positive thing and what can I learn from it.

And if I can create more awareness, I’ll do it,” she said.

Smulders is still dedicated to the fight against ovarian cancer.

“I felt like I was drowning.

Like I was going underwater and I just needed to come up for air.

Like I was in a river being pulled in a current.

Unable to breathe,” Lavigne said, as reported byThe Independent.

It went undiagnosed for so long that I was kind of f***ed.”

Norm was a pure comic.

He once wrote that ‘a joke should catch someone by surprise, it should never pander.’

He certainly never pandered,” Hoekstra toldDeadline.

Macdonald certainly kept his life focused on comedy.

The experience was meaningful to the group of comedians, especially those who were close friends with Macdonald.

“I felt this kind of joy that Norm’s back, to be honest with you.

I felt like he’s here with us.

Macdonald’s death still stings for O’Brien.

“Selfishly, I don’t feel badly for Norm.

I feel badly for all of us,” he said.

That must’ve been the case for Michael C. Hall, the star of “Dexter.”

Sharing his diagnosis proved to be positive for Hall.