Shannen Doherty is fighting cancer "like a girl," with a little help from her mama.
The 45-year-old actress, who has been going through a public battle with breast cancer, took to Instagram on Saturday to thank her mom for her support.
WATCH: Shannen Doherty Shares Photo of Her Completely Shaved Head: It Was an 'Impossibly Tough Day'
"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," she wrote, along with a photo of herself cuddled up in her mom's lap, adding the hashtags #mamarosa, #cancersucks and #fightlikeagirl.
Doherty hasn't shied away from sharing her cancer battle with her fans, often sharing pics on Instagram.
"Chemo day. A day many of us dread. Strength gets us thru but every once in awhile, you just want to hide in bed and let chemo day pass you by," she posted on Wednesday.
WATCH: Shannen Doherty Feels 'Blessed' For Husband's Support Amid Cancer Battle: I 'Can't Imagine My Life Without Him'
The week before, Doherty appeared to be in much higher spirits with her husband, Kurt Iswarienko.
"He loves me with pink hair or no hair. I'm blessed to have such a strong support team starting with @kurtiswarienko who loves me more every second," she wrote.
The Beverly Hills 90210 star revealed her breast cancer diagnosis in a lawsuit against her former management team in August, claiming her mastectomy and chemo treatments likely could’ve been avoided had her health insurance coverage been kept up to date.
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Earlier this month, Doherty shared exclusively with ET that her cancer had spread.
"I had breast cancer that spread to the lymph nodes, and from one of my surgeries we discovered that some of the cancer cells might have actually gone out of the lymph nodes," she revealed. "So for that reason, we are doing chemo, and then after chemo, I'll do radiation."
"The unknown is always the scariest part," she said. "Is the chemo going to work? Is the radiation going to work? You know, am I going to have to go through this again, or am I going to get secondary cancer?"
"Everything else is manageable," Doherty explained. "Pain is manageable. You know, living without a breast is manageable. It's the worry of your future and how your future is going to affect the people you love."
WATCH: Jason Priestley Speaks Out on Shannen Doherty's 'Incredibly Brave' Cancer Battle: 'She's Always Been a Tough Kid'
See more in the video below.