EXCLUSIVE: Rita Wilson and Tom Hanks Talk 'Darkest Days' at Stand Up to Cancer Telecast

Tom Hanks and Rita Wilson are getting real about the "darkest days" they faced while fighting cancer.

Wilson revealed that she was diagnosed with breast cancer in April 2015. The actress later underwent a double mastectomy, and revealed in December that she was cancer-free.

WATCH: Rita Wilson's Inspirational Message to Cancer Patients: 'You Can Get Through It'

ET's Denny Directo caught up with Hanks and Wilson at Stand Up to Cancer's telecast on Friday, where they opened up about their experiences fighting the disease.

"I want to say, first of all, that I'm thankful for every single day," Wilson shared.  "It's encouraging. For me, it's all about awareness and about raising money. I had incredible doctors. I was initially misdiagnosed and I got a second opinion on my pathology [which] showed that I did have cancer. So with that very, very early diagnosis I was able to take care of it and get it all done."

But Wilson wouldn't have been able to "get it all done" without the support of her husband.

RELATED: Rita Wilson Opens Up About Being Cancer Free: 'I'm 100% Healthy!'

"No one should go through this alone. That not only goes for the person who is carrying it and in bed for a very long time, but there's also the people who love them," Hanks said.

"This is an organization here that will step up, stand up for you," he added, speaking of Stand Up to Cancer. "All you have to do is make a call, get involved. You will not be alone in what could be some of the darkest days of your year."

ET sat down with Wilson in March, where she revealed that Hanks wasn't the only thing getting her through cancer. The 59-year-old actress also turned to music .

WATCH: EXCLUSIVE: Tom Hanks and Rita Wilson Adorably Dish on 'Magical' 60th Birthday Plans

"Music is a thing that actually can change your mood no matter what you're doing, whether it's listening to music or being able to write these songs," she said. "It's been an amazing outlet not only when you're feeling sad, but when you're feeling happy too."

See more in the video below.