Sienna Miller recently shot down rumors claiming that she's romantically involved with Brad Pitt.

The British-American actress was recently spotted having dinner with her "Lost City of Z" co-stars and Pitt in Los Angeles, leading many to believe she is dating the Hollywood actor. Miller opened up about the issue last week and she revealed that there's nothing going on between her and the newly divorced producer. 

"I'm not going to even dignify it with a response. It's predictable and silly," Miller told Page Six during a screening of her latest film, "The Lost City of Z," which was co-produced by Pitt's Plan B Entertainment company.

Earlier this month, it was reported that Miller and Pitt were seen doing some "serious flirting" while at a restaurant near L.A.'s ArcLight movie theater with friends. An insider claimed that the pair were "heavily enjoying each other's company." The "American Sniper" actress was most recently linked to Bennett Miller, her director on "Foxcatcher." They started dating last year after her split with Tom Sturridge, her former fiancé with whom she shares a four-year-old daughter named Marlowe.

Pitt, meanwhile, got divorced from Angelina Jolie in September. Even though he is trying to keep a low profile in the past few months, he has been spotted attending charity events and running errands lately. The 53-year-old made his last red carpet appearance in November 2016 when he went to London for the premiere of "Allied," his movie with Marion Cotillard. He was also present at the Golden Globe Awards in January to present the film "Moonlight," but he opted not to walk the red carpet before the event. Earlier this month, Pitt was seen in "The Lost City of Z" premiere in Hollywood.