Elizabeth Taylor: Michael Jackson Movie Is "Brilliant"

Elizabeth Taylor has high praise for the new movie about her late friend Michael Jackson.

The 77-year-old actress said Michael Jackson's This Is It is "the single most brilliant piece of filmmaking" she has ever seen.

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Although Taylor said she first saw the documentary last week, she was sworn to secrecy until Monday, and in a series of dozens of Twitter posts, she said that she "wept from pure joy at his God-given gift" and was "honored with the great privilege" of seeing the film.

Take an inside look at This Is It

"It cements forever Michael's genius in every aspect of creativity," she posted. "To say the man is a genius is an understatement. He cradles each note, coaxes the music to depths beyond reality... There will never, ever be the likes of him again. And we have this piece of film to remind us forever and ever that once there was such a man."

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She added: "You owe it to yourselves and your loved ones to see this again and again. Memorize it and say to yourselves, 'I saw genius in my lifetime.' I loved genius in my lifetime."

She also commended the film's director, Kenny Ortega, posting that he did a "masterful job" of capturing Jackson's creative process.

"Mr. Ortega catches Michael in his every mood," she posted. "You see in front of your eyes Michael's genius blossoming on this piece of film thanks to Kenny Ortega and his crews. I truly believe this film should be nominated in every category conceivable."

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Based on rehearsal footage shot while Jackson -- who died in June at age 50 -- was preparing for his series of comeback concerts in London, the movie opens worldwide Tuesday night.