Jensen Karp feels "so proud" of Danielle Fishel after she went public with her breast cancer diagnosis

He wrote on Instagram: "I'm so proud of @daniellefishel for using her platform to raise awareness. We can't miss appointments and we need to get checked (sic)"

Jensen also hailed Danielle's strength of character.

He said: "She's the strongest person I've ever met. She's got this."

Danielle revealed news of her diagnosis earlier this week.

The actress said on the 'Pod Meets World' podcast: "I was recently diagnosed with DCIS, which stands for ductal carcinoma in situ, which is a form of breast cancer.

"It is very, very, very early. It's technically stage zero.

"To be specific, just because I like too much information all the time, I was diagnosed with high-grade DCIS with micro-invasion."

Despite this, Danielle is remaining optimistic, insisting that she's "going to be fine".

She said: "I'm going to be fine. I'm having surgery to remove it.

"I'm going to be on some follow-up treatment. I've had to make a lot of decisions over the last couple of days."

Danielle is thankful that the issue has been found "so, so, so early", and the actress has encouraged her fans to get themselves checked out, too.

She said: "The only reason I caught this cancer when it is still stage zero is because the day I got my text message that my yearly mammogram had come up, I made the appointment.

"They found it so, so, so early that I'm going to be fine. I hope it will encourage anyone to get in there."