Brad Pitt spotted 'flirting' with famous actress

Brad Pitt is single and ready to mingle -- or so it seems!

The 53-year-old actor was spotted doing some "serious flirting" with Sienna Miller during a private dinner. The pair was at a restaurant with a group of friends near the Los Angeles theatre where the premiere of the "The Los City of Z" was held on the same night.

It's no coincidence that Brad and Sienna were seen together, as the actress stars in the new movie from his Plan B production company.

A witness revealed to Page Six that the two "were heavily enjoying each other's company" and "they were talking to each other all night."

Miller dodged any romance rumors when they first started filming in 2015 (and before Angelina Jolie and Pitt split).

"So this is the truth about that: Brad Pitt is producing the movie that I just wrapped, but I didn't see him. He's not been to the set. You know, he's the producer of the film and I've met him twice. It's insane," the actress said.

However, the big difference this time around is Pitt is very much single, and so is Miller, so we're totally onboard for this surprise pairing.

Since his bombshell breakup with Jolie late last year, Pitt has been concentrating on working on himself. The "Allied" star has rarely made public appearances in the past few months and has instead been holed up at a Los Angeles art studio where he's been busy sculpting.

When he has been spotted out in public, people have been quick to notice his much slimmer frame, which those close to him credit to his commitment to a much healthier lifestyle.

And while neither Brad or Sienna have publicly commented on these "flirting" rumors, we've already come up with their couple name -- #Brienna.