Sources told PageSix the 36-year-old actor is busy researching on art at various centres in Los Angeles.
"He plays an art critic in a revealing look at the art market in LA that involves billionaire collectors, gallerists, auctions and sales. He plays the critic and he's busy doing research," the insider said.
The untitled film for Netflix will see Gyllenhaal reunite with his "Nightcrawler" co-star Rene Russo and director Dan Gilroy.
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