'Split' star Betty Buckley reveals 'subliminal message' of M. Night Shyamalan's film

Betty Buckley, who stars alongside James McAvoy in M. Night Shymalan's upcoming thriller, "Split," recently revealed to AOL Entertainment that there is a "subliminal message" in the film.

The movie centers on Kevin, who suffers from Dissociative Identity Disorder (D.I.D.) and has 23 other personalities. His wide-ranging behavior is brought to life by McAvoy's incredibly versatile performance, which becomes even more awesome when the audience realizes the potential of the human mind that Kevin represents.

SEE ALSO: Director M. Night Shyamalan teases potential 'Split' sequel: 'Maybe there's a future'

As Buckley, who plays Kevin's therapist Dr. Fletcher, put it, "Split" (out Jan. 20) forces the audience to consider "the potential of humanity, which is really vast. We've come so far as a species, but we have so far still to go, and I think we can do it. I love that subliminal message of "Split" that [director] Night has given us. [It] is one of real hope."

When discussing the film with me, the 69-year-old actress called it "an honor to get to work with" McAvoy and called his acting in "Split" "one of the best performances [...] that I've ever seen."

See photos of Betty Buckley:

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Betty Buckley out and about
NEW YORK, NY - JANUARY 18: Actor Betty Buckley attends the 'Split' New York Premiere at SVA Theater on January 18, 2017 in New York City. (Photo by Roy Rochlin/FilmMagic)
NEW YORK, NY - JANUARY 18: Betty Buckley, Anya Taylor-Joy, James McAvoy and M. Night Shyamalan attend Build Series Presents to discuss 'Split' at Build Studio on January 18, 2017 in New York City. (Photo by Laura Cavanaugh/FilmMagic)
NEW YORK, NY - JANUARY 18: (L-R) Cast members director M. Night Shyamalan, Betty Buckley, Anya Taylor-Joy and James McAvoy attend the Build Series at Build Studio on January 18, 2017 in New York City. (Photo by Rob Kim/Getty Images)
HOLLYWOOD, CA - NOVEMBER 15: Betty Buckley and James McAvoy arrive at AFI FEST 2016 Presented By Audi - Screening Of Universal Picture's 'Split' at TCL Chinese Theatre on November 15, 2016 in Hollywood, California. (Photo by Jerod Harris/WireImage)
NEW YORK, NY - JANUARY 18: Betty Buckley attends Build Series Presents to discuss 'Split' at Build Studio on January 18, 2017 in New York City. (Photo by Laura Cavanaugh/FilmMagic)
HOLLYWOOD, CA - NOVEMBER 15: Director/writer/producer M. Night Shyamalan (L) and actress Betty Buckley attend the premiere of 'Split' at AFI Fest 2016, presented by Audi at The Chinese Theatre on November 15, 2016 in Hollywood, California. (Photo by Gabriel Olsen/Getty Images for AFI)
HOLLYWOOD, CA - NOVEMBER 15: Actress Betty Buckley attends the premiere of 'Split' at AFI Fest 2016, presented by Audi at The Chinese Theatre on November 15, 2016 in Hollywood, California. (Photo by Tara Ziemba/Getty Images)
NEW YORK, NY - MAY 01: Betty Buckley attends Broadway Acts For Women: A Star-Studded Night Of Karaoke And Comedy at 54 Below on May 1, 2016 in New York City. (Photo by Santiago Felipe/Getty Images)
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At one point during production, while filming an intense scene, Buckley recalled the wild reaction that everyone on set had to McAvoy's particularly powerful performance.

"When they called cut, the whole crew -- everybody! -- all of us watching were just like, 'Bravo!,'" she remembered.

We're right there with Betty on this one; we've seen "Split," and it's absolutely amazing. Watch our full interview with Betty above.

More from AOL.com:
Surprisingly common thing 'Split' star James McAvoy recently did for the 'first time'
Anya Taylor-Joy reveals why she cried before filming her 'daunting' role in 'Split'
Lisa Edelstein on 'Girlfriends' Guide To Divorce': 'It's been a wonderful experience'

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