Bruce Willis’ early signs of frontotemporal dementia (FTD) were difficult to identify, which is understandable.

Emma Heming Willis, his wife, revealed to journalist Katie Couric in an interview for Town & Country on Tuesday that the “Die Hard” star had a childhood condition that concealed one of his most prominent early warning flags.

“For Bruce, it began with words. Emma Willis told Couric, “He had a severe stutter as a child.”

The former model claimed that his stammer “propelled him into acting” in the first place.

Bruce Willis and Emma Heming Willis celebrate his 60th birthday at Harlow on March 21, 2015, in New York City.Kevin Mazur via Getty Images.

“He went to college, and a theater teacher told him, ‘I’ve got something that will help you.'” Bruce learned after that class that he could memorize a script and deliver it without stuttering.

Emma Willis said that the actor “has always had a stutter, but he has been good at covering it up.”

“As his language started changing, it [seemed like it] was just a part of a stutter, it was just Bruce,” Emma Willis told me. “Never in a million years would I think it would be a form of dementia for someone so young.”

The couple attended a reception in 2013.Andrew H. Walker via Getty Images.

The “Pulp Fiction” star’s family made his condition public last year.

“Unfortunately, communication issues are only one sign of Bruce’s disease. Demi Moore, his ex-wife, released a comment on The Association for Frontotemporal Degeneration’s website, stating that while it is difficult, it is a relief to finally have a definite diagnosis.

Emma Willis told Couric that eventually discovering out what was going on with her husband “was key” in helping him and explaining his FTD diagnosis to the couple’s two kids, Mabel Ray, 12, and Evelyn Penn, 10.

“This disease is misdiagnosed, it’s missed, it’s misunderstood, so finally getting to a diagnosis was key so that I could learn what frontotemporal dementia is and I could educate our children,” Emma Willis told me. “I have never tried to sugarcoat anything for them. They’ve grown up with Bruce’s decline throughout the years. “I’m not trying to protect them from it.”

In 2011, Bruce Willis and Demi Moore attended the “Love, Loss & What I Wore” event with their daughter Rumer Willis.Bruce Glikas via Getty Images.

Moore, who was married to Bruce Willis from 1987 to 2000 and shares three adult children with him — Rumer, Scout and Tallulah — seemed to echo Emma Willis’ sentiment of acceptance earlier this month.

“You know, I’ve mentioned this before. Moore accepted a prize at the Hamptons International Film Festival, stating, “The disease is what it is.” “And I think you have to be in real deep acceptance of what that is.”

The “Ghost” alum added: “But for where he’s at, he is stable.”

Despite Emma Willis experiencing “grief and sadness” due to her husband’s diagnosis, she also let Bruce Willis’ concerned fans know in March via Instagram that just because the “Moonlighting” alum has a neurodegenerative condition, there’s still plenty of love and joy in their household.

“Stop scaring people to think that once they get a diagnosis of some kind of neurocognitive disease that ‘That’s it. It is over. Let’s pack it up. Nothing else to see here; we’re finished. No. It is the complete opposite of that, OK?” Emma Willis said in a video posted to her account.