United Kingdom, Aug. 28 -- Christina Applegate says her battle with MS has "broken" her daughter Sadie.

The Dead to Me star was diagnosed with multiple sclerosis (MS) - a chronic autoimmune disease that affects the brain and central nervous system - in 2021, and she has detailed how her 14-year-old girl has struggled to see her mom lose control of her movement as she's gotten older.

Speaking to co-host Jamie Lynn Sigler on their podcast MeSsy, she said: "In my situation, Sadie only knew me as healthy, and a runner, and a Pelotoner and a dancer, and she only knew that.

"So then when this came about, 2021, she was like stoic about it.

"And now, I see her look at me when I'm in bed and can't quite move, or I wanna go say goodnight to her...