"Been working non-stop, just catching my breath," the 23-year-old Australian actress tweeted on Thursday, Nov. 7. "There's absolutely no truth to the ridiculous rumor in Star mag."
The denial comes in the wake of a Star cover story which claims that the 45-year-old actor had a flirty photo booth session that maybe led to something more with Robbie, his leading lady in Focus.
The report stems from pics—that were duly splashed on the tabloid's cover—of the duo hamming it up in the booth.
"It's disappointing that goofing around on set could be taken so out of context," Robbie also wrote on Twitter.
"These pictures were commissioned by production. The entire cast and crew saw them taken," a source told E! News on Wednesday, Nov. 6. "The photo booth was on set all day for a bit of fun. It wasn't even a party—they were taken during the day and everyone knew about them. It was the last day of shooting."
The source adds: "Will and Margot are absolutely just friends, that is all."
In Focus, which was shooting in New Orleans, Robbie plays an impressionable woman who gets caught up—and then becomes romantically involved—with Smith's veteran grifter. Kristen Stewart was previously attached to the role, but she dropped out due to scheduling conflicts.
Will and Jada Pinkett Smith tied the knot in 1997, the actor's second marriage, and are parents to son Jaden and daughter Willow. Will also has son Trey from his first marriage.