Shelley Duvall unrecognizable in jarring 'Dr. Phil' clip

Actress Shelley Duvall is seen in Cannes, France, in May 1977. (AP)

Shelley Duvall, best-known for her role in “The Shining,” is now unrecognizable in a clip released to promote her upcoming appearance on “Dr. Phil.”

Duvall sat down with Dr. Phil McGraw for an interview, and she revealed she has been battling serious mental illness.

The once-celebrated actress disappeared from the public eye in the early 2000s.

“I’m very sick. I need help,” Duvall said.

She said she believes her “Popeye” co-star Robin Williams is not dead, but rather he is “shape-shifting.”

Duvall said she has seen Williams since his 2014 death.

She also claimed she was facing a threat from the Sheriff of Nottingham.

Her entire sitdown with Dr. Phil airs Friday.