Jennie Garth continues to marvel at her former "Beverly Hills, 90210" co-star Shannen Doherty as she battles cancer.

In a video interview with Us Weekly, Jennie praises Shannen for her courage and grace and also for trying to use her situation for good.

"She's strong and beautiful," Jennie told the magazine. "She's really reaching out to people who are going through the same thing as her and helping a lot of people. I think she's doing a great job."

Last month, Jennie even took to Instagram to share a photo with the caption, "Fight Like a Brenda" -- an homage to Shannen's legendary "90210" character.

Jennie added that Shannen is the "strongest lady I've ever known," and said she was "in awe" of her.

Last year, Shannen was diagnosed with breast cancer, and she's been chronicling her fight on Instagram ever since.

"It's interesting because Instagram usually ends up being about all the beautiful and best parts of my day or life or how I look the best," Jennie said. "She's willing and brave enough to put herself out there, going through this horrendous experience with such dignity and grace. I think that gives a lot of people the hope and faith that they can do it too."

On Aug. 13, the "Charmed" alum, who shaved her head in July, shared a moving photo of her and her mom sharing a tender moment.

"Sometimes there's nothing like a mothers love to help get you thru. Thank you mom for always being there and being so strong for me. I love you. #mamarosa#cancersucks #fightlikeagirl," she captioned the black-and-white image.

On Nov. 28, she underwent her first radiation treatment.

"First day of radiation treatment. I look like I'm about to make a run for it which is accurate," she captioned the photo. "Radiation is frightening to me. Something about not being able to see the laser, see the treatment and having this machine moving around you just scares me."

She continued, "I'm sure I'll get used to it but right now.... I hate it. #radiation #radiationmondaysucks #stillfightinglikeagirl."

On Dec. 7, Shannen underwent her second radiation treatment. In doing so, she praised her doctors but added that "none of this is easy."

"Meet Anna and Vince, 2 members of my radiation team. They make a concerted effort to talk to me and show me what's going on in this process so I don't feel so out of control in it," she wrote in the caption of a photo of her with the duo. "Never be too timid to speak up and ask for what you need to get thru the process. None of this is easy but a great team can make it more pleasant. #cancerslayer #fightlikeagirl #warrior #communicationiskey."