Qualley was dressed in daisy dukes and a tiny crop top, while Brad was dressed in a yellow Hawaiian shirt, a white Champion spark plug T-shirt, plus jeans and suede boots.
In the movie, Brad plays Cliff Booth, the long-time stunt double of 43-year-old Leo's Rick Dalton, the fictional faded former star of a western TV series.
Last week it was reported the Brad's newly committed partner Jennifer Aniston was "livid" of the pair's chemisty.
“Jen is absolutely livid that Brad is filming with Margaret, and hit the roof when she saw them getting so chummy on set,” a source told New Idea.
“It wasn’t enough that she had to contend with all the rumours of Justin and Margaret’s close friendship on The Leftovers, she now has to contend with more whispers about her and Brad.”
Brad and Margaret – the daughter of Four Weddings and a Funeral actress Andie MacDowell – looked very comfortable in each other’s company when spotted laughing and joking on the set of Quentin Tarantino’s Once Upon a Time in Hollywood.
