The outfit will be part of a public exhibition with Turner Classic Movies.
A man who made appearances as Darth Vader at film premieres and fan conventions will sell a costume created in 1979 by the "Star Wars" design team at an auction of classic movie memorabilia next month, auction house Bonhams said.
The 17-piece ensemble includes the villain's black mask, boots, a pair of capes and a cod piece, said the auctioneers, who estimated it could sell for between $1 million and $2 million.
The seller is Bryce "Kermit" Eller, whose deep voice helped him land a job making public appearances as Vader at premieres, book signings, conventions and the 1978 Academy Awards.
The costume going up for auction is one of a handful of Vader outfits produced in 1979 by the team of "Star Wars" costume designer John Mollo in London for the movie "The Empire Strikes Back," Bonhams said. It is unclear if any pieces were used on screen before they were given to Eller.
The components are made from leather, wool, silk, fiberglass and other materials, Eller said in an interview.
"It's really, really hot," Eller said. "You've got multiple layers. It takes about 25 minutes to put it on, and you've got to have assistance."
In fact, Eller said he once fainted after wearing the costume for hours and becoming dehydrated. Paramedics came to his assistance and wanted to cut it off.
"I said 'absolutely not,'" Eller said. "I said 'I'll heal. The costume won't.'"
The outfit will be part of a public exhibition with Turner Classic Movies starting on May 4 before going on sale on May 14.
Props and costumes from "Star Wars", one of the most popular film franchises, have fetched high prices at auction.
In 2017, a complete R2-D2 droid used in the first, 1977 "Star Wars" movie sold for $2.76 million, and a lightsaber used by hero Luke Skywalker fetched $450,000.
Avengers: Endgame," the hugely anticipated series-ender from Disney and Marvel, set a new standard for Hollywood blockbusters this weekend with stunning hauls of $350 million in North America and $1.2 billion worldwide.
An emotional Patrick Stewart said he was "deliriously happy" to be returning to Star Trek a generation later, telling San Diego Comic-Con that "you cannot have too many franchises in a career."
With a star-studded voice cast including Beyonce and estimated $250 million budget, Hollywood's reigning hitmaker has spared no expense bringing arguably its most beloved source material roaring to photo-realistic life.
A new urban culture project in the city of Halle, 170 kilometres southwest of Berlin, hopes to promote social cohesion by transforming architectural sins into monumental masterpieces.
Actress Katrina Kaif has a doppelganger, and fans on social media can't stop talking about the uncanny resemblance between the two.
Authors from Asia, Africa and South America are among those on the National Book Awards long list for translated literature, a category started last year.