By MICHAEL CIDONI
Associated Press Writer

Want a behind-the-scenes look at the set of Marilyn Monroe's last fully produced feature? Better call the bank.

Two reels of silent, 8-millimeter color film titled ''On Set With 'The Misfits''' is going on the auction block, with bids starting between $10,000 and $20,000. Julien's Auctions is listing the 47-minute film next month at Planet Hollywood Resort and Casino in Las Vegas.

According to the Julien's Auctions Web site, it's the original film by amateur photographer Stanley Floyd Kilarr, who shot scenes of the stars and crew during the making of ''The Misfits'' — the final completed film for both its stars, Monroe and Clark Gable.

Gable had a fourth heart attack just after filming was finished, and died Nov. 16, 1960, some two months before the movie's U.S. release. Monroe died Aug. 5, 1962.

Kilarr was part of the ''Misfits'' crew and shot his own film throughout production. ''On Set With 'The Misfits''' features candid moments with Monroe and Gable, as well as Montgomery Clift, Thelma Ritter and director John Huston. The video shows the actors preparing for scenes, chatting with crew members and others on the set, and relaxing between takes.

''The two things that make it interesting are that very few people knew it even existed, and that the family was able to obtain a copyright,'' Julien's Auctions President Darren Julien told AP Television. That means the winning bidder will own the rights to license the footage for things like documentaries and special-edition DVDs.

The film is part of ''Julien's Summer Entertainment Sale,'' which consists of more than 400 lots of Hollywood memorabilia. The auction is set to begin June 12, with bids accepted at Planet Hollywood and online.