Bruce Willis' daughter Scout Willis shared her thoughts on the actor's "cruel" diagnosis of frontotemporal dementia (FTD).

Scout took to her Instagram story hours after Demi Moore announced Bruce's diagnosis to the world. 

"Feeling emotionally tired and a bit overwhelmed, yet also very in awe of the love so many people have for my papa," she wrote alongside a photo of herself.

Scout Willis shares an Instagram story

Scout Willis gave fans a glimpse into how she was feeling after it was announced that her dad, Bruce Willis, had been diagnosed with frontotemporal dementia. (Instagram: Scout Willis)

WHAT IS FRONTOTEMPORAL DEMENTIA, THE DIAGNOSIS BRUCE WILLIS HAS RECEIVED?

Rumer Willis and her sisters at an event

Scout Willis' sisters, Tallulah and Rumer, also shared messages of their own about their dad to Instagram. (Getty Images)

Her sisters, Tallulah and Rumer Willis, shared her sentiment by reposting the story to their own accounts.

"Second this Scouter," Tallulah wrote. "Feeling the abundant love for our guy and our family."

Rumer added, "I third this Scouter and [Tallulah] feeling so deeply grateful and in awe of the love for us and our sweet Daddio."

Demi Moore and Bruce Willis

Demi Moore and Bruce Willis share three children together. (Instagram: Scout Willis)

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Moore announced Bruce's new diagnosis months after the world learned the actor was suffering from aphasia.

"Our family wanted to start by expressing our deepest gratitude for the incredible outpouring of love, support and wonderful stories we have all received since sharing Bruce’s original diagnosis," Moore wrote. "In the spirit of that, we wanted to give you an update about our beloved husband, father and friend since we now have a deeper understanding of what he is experiencing."

She added, "Since we announced Bruce’s diagnosis of aphasia in spring 2022, Bruce’s condition has progressed and we now have a more specific diagnosis: frontotemporal dementia (known as FTD). Unfortunately, challenges with communication are just one symptom of the disease Bruce faces. While this is painful, it is a relief to finally have a clear diagnosis."

FTD is "the result of damage to neurons in the frontal and temporal lobes of the brain," according to the National Institute on Aging. "Many possible symptoms can result, including unusual behaviors, emotional problems, trouble communicating, difficulty with work, or difficulty with walking."

The Willis-Moore family at Demi's book launch

Bruce Willis and Demi Moore divorced more than 20 years ago, but have remained close. Attending her "Inside Out" book party on Sept. 23, 2019, in Los Angeles are, from left, Rumer Willis, Demi Moore, Bruce Willis, Scout Willis, Emma Heming Willis and Tallulah Willis. (Stefanie Keenan via Getty Images)

Bruce shares Scout, Tallulah and Rumer with ex-wife Moore. The two married in 1987. Bruce and Moore divorced in 2000.

Bruce married Emma Heming at their home in Turks and Caicos in March 2009, and the couple has two daughters, Mabel and Evelyn.

The "Assassin" star retired from acting after he was diagnosed with aphasia in 2022.

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Fox News Digital's Tracy Wright contributed to this report.