For an entire generation, Christina Applegate will always be Kelly Bundy.
She was the mischievous blonde daughter who walked into the Bundy living room on Married… with Children and routinely stole the scene. Applegate was still a teenager when the sitcom began in 1987, and by the time it ended a decade later, millions of viewers felt as though they had watched her grow up.
But the woman behind Kelly Bundy would eventually experience a transformation far more profound than anything television audiences saw.
At 39, Christina became a mother for the first time.
She later described the arrival of her daughter, Sadie, as the best thing that had ever happened to her. Motherhood gave her a kind of love she hadn’t experienced before. Us
Today, Sadie is 15.
And their relationship has become one of the most emotional parts of Christina’s life with multiple sclerosis.
Becoming a mother came after one of the hardest periods of her life
Christina’s path to motherhood wasn’t uncomplicated.
In 2008, at only 36, she was diagnosed with breast cancer after an MRI detected the disease at an early stage.
She ultimately underwent a double mastectomy.
Three years later, her life changed for an entirely different reason.
Christina and musician Martyn LeNoble welcomed Sadie Grace in January 2011. Us
The actress was 39.
After everything her body had been through, holding her baby carried extraordinary emotional weight.
Christina later recalled the moment immediately after Sadie’s birth, when she put aside years of insecurity surrounding her body and simply held her newborn against her chest.
For the actress who had spent most of her life working in front of cameras, motherhood suddenly mattered in a completely different way.
She became the active mom Sadie remembers
The childhood Sadie remembers is filled with movement.
Christina ran.
She exercised on her Peloton.
She played tennis.
She hiked.
And perhaps most importantly, she danced with her daughter.
Mother and daughter had their own nighttime ritual. After dinner, before bath and bedtime, they would have what they called their “Dance Party.”
They did it night after night.
In her 2026 memoir, Christina remembered dancing with Sadie for hours and described just how dramatically that life contrasts with the one she has today. The Guardian
Sadie remembers it too.
She has spoken publicly about watching the mother who once danced with her for hours lose abilities she had always taken for granted. The Independent
Then, in 2021, everything changed.
Christina was diagnosed with multiple sclerosis
Applegate revealed in August 2021 that she’d been diagnosed with MS several months earlier.
Multiple sclerosis is a chronic disease involving the central nervous system. Symptoms and progression can vary enormously from person to person, and there currently isn’t a cure.
For Christina, its effects became severe.
Pain.
Fatigue.
Mobility difficulties.
Muscle weakness.
Tremors.
Days when her legs simply wouldn’t cooperate.
Her illness eventually made ordinary activities extraordinarily difficult and forced a major retreat from the career she’d maintained since childhood. People.com
But there was another consequence she found even harder to accept.
Sadie was watching.
“She’s lost her mom. I’m not dead.”
Christina has spoken painfully openly about what MS has done to their relationship.
Not because mother and daughter aren’t close.
Quite the opposite.
It’s because Sadie remembers exactly who her mother was before the illness.
“She’s lost her mom. I’m not dead,” Christina explained in a 2026 interview.
What she meant was that the mother Sadie remembered dancing, hiking and playing tennis with could no longer do many of those things. Los Angeles Times
In an earlier conversation on her MeSsy podcast, Christina said the transformation had “broken” her daughter.
Sadie had been only 10 when Christina was diagnosed.
Before then, she’d known her mother as healthy, athletic and energetic. Afterward, there were days when Christina couldn’t even make it down the hallway to say goodnight. E! Online
For a child, it was an enormous change to understand.
Sadie eventually told the story from her side
When Sadie appeared on her mother’s podcast, she described the experience herself.
She remembered those hours of dancing together when she was little.
Then came 2021.
Watching her mother lose abilities she’d possessed throughout Sadie’s childhood was difficult, she explained. But Sadie also found meaning in being able to support her. The Independent
And that support is now visible when they appear together.
Christina has described how Sadie instinctively grabs her arm when they’re outside, helps with her cane and recognizes when her mother is struggling.
Their roles haven’t reversed — Christina remains very much her mother — but their relationship has adapted to circumstances neither expected.
Her physical transformation has been dramatic
The RARE PHOTOS of Christina through the decades capture just how much life has changed.
There is teenage Christina as Kelly Bundy.
Then the glamorous movie star of The Sweetest Thing and Anchorman.
Later came Dead to Me, the Netflix series that earned her some of the strongest reviews of her career.
And then there are the photographs after her MS diagnosis.
At first, Christina spoke openly about gaining weight after becoming ill.
More recently, the opposite has become visible.
In her 2026 memoir, Applegate wrote candidly about losing substantial muscle mass. She described her limbs as extremely thin and acknowledged that having so little muscle creates additional concern if she falls. The Guardian
It’s an important distinction from ordinary celebrity “weight-loss” stories.
Christina hasn’t presented this transformation as a fitness achievement.
It’s occurring in the context of serious chronic illness.
At 54, much of her day is now spent in bed
In February 2026, Christina revealed just how restricted her everyday life had become.
She said she was largely confined to bed.
Activities that once required no thought can now demand enormous effort. Driving can be difficult. Walking around the house can be difficult. Even making breakfast for Sadie can become a physical challenge. The Guardian
Her acting career has consequently changed as well.
In her memoir, Christina wrote that she’d realized she could no longer tolerate many of the ordinary requirements of film and television production — early calls, long car rides and the physical demands of spending hours on set. The Guardian
For an actress who had worked since childhood, losing that independence has been devastating.
Yet there is one routine she fiercely protects.
Driving Sadie to school has become her favorite thing
It sounds incredibly ordinary.
That’s precisely why it matters.
Christina has said that when she is able, driving her daughter to school is the time she feels most like herself.
They turn up the music.
They laugh.
Sometimes Sadie reaches over and holds her mother’s hand.
Then Christina returns home, where she says she spends much of the remainder of the day in bed. aarp.org
A routine that another parent might barely notice has become precious.
Because for those few minutes, Christina isn’t the actress with MS.
She’s simply Sadie’s mom.
Her health journey became even more difficult in 2026
This year brought another frightening period.
Recent reporting says Christina underwent an extended hospitalization related to her ongoing health difficulties before eventually returning home. She subsequently shared an update saying that she was gradually getting stronger. Vulture
Her public life remains dramatically smaller than it once was.
She isn’t pretending otherwise.
One of the most striking things about Christina’s approach to MS has actually been her refusal to turn it into a polished inspirational story.
She has repeatedly described the pain, frustration and anger without insisting that illness must somehow be considered a gift.
In her memoir, she explicitly rejected describing MS as a “blessing.” The Guardian
Instead, she talks about what has been lost — while still recognizing the relationships that remain.
One of those relationships is with another actress who understands
Christina now co-hosts the podcast MeSsy with The Sopranos actress Jamie-Lynn Sigler, who has also lived with MS for decades.
Their friendship gives Christina something even people who love her deeply cannot always provide:
Someone who understands the physical experience without requiring an explanation.
MS is sometimes described as an “invisible” disease because people may look well while experiencing significant pain, fatigue or neurological symptoms. Christina has spoken about precisely that disconnect. aarp.org
That is also why photographs can be misleading.
A smiling red-carpet image doesn’t necessarily tell us how someone felt before or after it was taken.
Motherhood remains the center of the story
For all the headlines surrounding Christina’s health, the quieter story is what has happened between mother and daughter.
Sadie has grown from the baby Christina once held against her chest into the teenager who now steadies her mother’s arm.
Yet Christina remains determined to do whatever pieces of motherhood her body will allow.
If Sadie wants her mother’s scrambled eggs, Christina tries to make them.
If she can drive her to school, she does.
If they can sit together and laugh, they do that too.
Christina told AARP that her 15-year-old still deliberately closes the door at the end of the day because she wants private “Mama and Sadie time.” aarp.org
After everything MS has taken away, that relationship remains remarkably intact.
Their rare photographs tell the story without saying much
Look at the RARE PHOTOS of Christina and Sadie over the years, and the passage of time becomes startling.
There is Christina holding her tiny daughter.
There they are together before MS changed their lives.
Then come the later red carpets, where Christina sometimes carries a cane and Sadie remains close beside her.
Their life today isn’t the one Christina imagined when she became a mother at 39.
She cannot dance every night the way she once did.
She can’t always walk down the hallway.
Some days, much of the world exists beyond the bedroom where she rests.
But motherhood didn’t disappear when her abilities changed.
At 54, Christina is still finding ways to be present for the person who gave her that “whole new level of love” all those years ago.
And sometimes that means something as simple as turning up the music in the car, laughing with her daughter on the way to school and making an ordinary morning feel precious.
For more on stars facing challenges, read about a New York Times Games executive whose life was tragically cut short, or see how Céline Dion made an emotional surprise appearance while facing her own health struggles. And for a heartwarming look at enduring love, check out Pierce Brosnan’s 32-year romance with Keely Shaye.
