Los Angeles, California - Bruce Willis' aphasia diagnosis was apparently suspected by his coworkers on set in recent years.

Following an announcement from Willis' family on Wednesday about his retirement due to his health, reports are now swirling that his coworkers in Hollywood expressed concern for his well-being.

Per the Los Angeles Times, some of Willis' costars and directors who worked with him noted that the actor was exhibiting signs of decline.

In one of his recent action films, Out of Death, director Mike Burns sent out an urgent request to make Willis' part smaller before he arrived on set.

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"It looks like we need to knock down Bruce’s page count by about five pages. We also need to abbreviate his dialogue a bit so that there are no monologues, etc," read an email from the director to the film’s screenwriter in June 2020.

In documents reviewed by the outlet, individuals questioned whether the actor was fully aware of his surroundings on set, with some filmmakers relaying difficult moments where the Pulp Fiction star grappled with the loss of his mental acuity and an inability to remember his lines.

The Times also noted an alleged incident in 2020 on the Cincinnati set of Willis's film Hard Kill, where the actor misfired a loaded gun on the wrong cue.

Though no one was injured, and the prop had a blank in it, the accident supposedly left actors and crew members shaken.

Prior to his retirement, Willis had done an incredible 22 films in four years.

Yet, some fans have noted that the star has mainly stuck to low-budget films, many of which were harshly panned by fans and critics.

Still, the Hollywood legend has received an outpouring of support since his aphasia diagnosis became public knowledge this week.

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Randall Emmett, who directed Willis' 2021 flick Midnight in the Switchgrass, shared with People, "Bruce and I have worked on over 20 films together. He is a terrific actor and legendary action star, an incredible father and a close friend.

"I fully support Bruce and his family during this challenging time and admire him for his courage in battling this incredibly difficult medical condition. Bruce will always be a part of our family."

M. Night Shyamalan, the director of classics The Sixth Sense and Unbreakable starring Willis, supported the 67-year-old in a heartwarming tweet, calling the actor his "big brother."

"All my love and respect to my big brother Bruce Willis," he wrote. "I know his wonderful family is surrounding him with support and strength. He will always be that hero on that poster on my wall as kid."