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."

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Brad Pitt out and about
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Brad Pitt out and about
HOLLYWOOD, CA - APRIL 05: Brad Pitt arrives at the Premiere Of Amazon Studios' 'The Lost City Of Z' at ArcLight Hollywood on April 5, 2017 in Hollywood, California. (Photo by Steve Granitz/WireImage)
BEVERLY HILLS, CA - JANUARY 08: In this handout photo provided by NBCUniversal, presenter Brad Pitt onstage during the 74th Annual Golden Globe Awards at The Beverly Hilton Hotel on January 8, 2017 in Beverly Hills, California. (Photo by Paul Drinkwater/NBCUniversal via Getty Images)
Brad Pitt attends the 'Allied' premiere in Madrid on Nov 22, 2016 (Photo by Gabriel Maseda/NurPhoto via Getty Images)
SHANGHAI, CHINA - NOVEMBER 14: Brad Pitt attends the red carpet for the Paramount Pictures title 'Allied' on November 14, 2016 at Shanghai Postal Museum in Shanghai, China. (Photo by Emmanuel Wong/Getty Images for Paramount Pictures )
WESTWOOD, CA - NOVEMBER 09: Brad Pitt arrives at the Fan Event For Paramount Pictures' 'Allied' at Regency Village Theatre on November 9, 2016 in Westwood, California. (Photo by Steve Granitz/WireImage)
LOS ANGELES, CA - JULY 24: Brad Pitt is seen at LAX on July 24, 2016 in Los Angeles, California. (Photo by starzfly/Bauer-Griffin/GC Images)
NEW YORK, NY - JULY 21: Actor Brad Pitt is seen coming out of a hotel in Soho on July 21, 2016 in New York City. (Photo by Raymond Hall/GC Images)
LOS ANGELES, CA - JUNE 21: Brad Pitt is seen at LAX on June 21, 2016 in Los Angeles, California. (Photo by starzfly/Bauer-Griffin/GC Images)
NEW YORK, NY - JULY 19: Brad Pitt seen in Manhattan on July 19, 2016 in New York City. (Photo by Robert Kamau/GC Images)
LE MANS, FRANCE - JUNE 18: Actor Brad Pitt attends the start of the 84th Le Mans 24-hours endurance race on June 18, 2016 in Le Mans, France. (Photo by Marc Piasecki/WireImage)
LOS ANGELES, CA - JUNE 09: Brad Pitt is seen at LAX on June 09, 2016 in Los Angeles, California. (Photo by starzfly/Bauer-Griffin/GC Images)
LONDON, UNITED KINGDOM - MARCH 31: Marion Cotillard and Brad Pitt seen filming scenes for 'Five Seconds Of Silence in Hampstead on March 31, 2016 in London, England. (Photo by Alex B. Huckle/GC Images)
NEW YORK - NOVEMBER 26: Brad Pitt seen out in Tribeca on November 26, 2015 in New York, New York. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
NEW YORK, NY - NOVEMBER 23: Brad Pitt attends 'The Big Short' New York Premiere at Ziegfeld Theater on November 23, 2015 in New York City. (Photo by James Devaney/WireImage)
Brad Pitt attends the 'Allied' premiere in Madrid on Nov 22, 2016 (Photo by Gabriel Maseda/NurPhoto via Getty Images)
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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.

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Sienna Miller
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Sienna Miller
NEW YORK NY - JANUARY 15: Sienna Miller seen in Tribeca on January 15, 2015 in New York City. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
British actress Sienna Miller will replace Emma Stone as singer Sally Bowles for the final six weeks of the Broadway run of the musical "Cabaret." The actress will join the cast of the musical - set during the rise of Nazism in Germany - on Feb 17. "Miller will take over from Stone, whose last performance is on Feb. 15, until the end of the show's limited engagement on March 29," the Roundabout Theatre Company said in a statement.
NEW YORK, NY - JANUARY 15: Sienna Miller is seen at 'The Daily Show With Jon Stewart' on January 15, 2015 in New York City. (Photo by Alessio Botticelli/GC Images)
NEW YORK NY - JANUARY 13: Sienna Miller seen in Tribeca on January 13, 2015 in New York City. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
NEW YORK NY - JANUARY 13: Sienna Miller seen out in Soho after lunch at Balthazar on January 13, 2015 in New York City. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0193 -- Pictured: (l-r) Actress Sienna Miller during an interview with host Jimmy Fallon on January 13, 2015 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - JANUARY 12; Actress Sienna Miller is seen walking in Soho on January 12, 2015 in New York City. (Photo by Raymond Hall/GC Images)
BEVERLY HILLS, CA - JANUARY 11: Sienna Miller arrives at the 72nd Annual Golden Globe Awards at The Beverly Hilton Hotel on January 11, 2015 in Beverly Hills, California. (Photo by Steve Granitz/WireImage)
BEVERLY HILLS, CA - JANUARY 11: Sienna Miller arrives at the 72nd Annual Golden Globe Awards at The Beverly Hilton Hotel on January 11, 2015 in Beverly Hills, California. (Photo by Steve Granitz/WireImage)
BEVERLY HILLS, CA - JANUARY 11: Actress Sienna Miller attends the 72nd Annual Golden Globe Awards at The Beverly Hilton Hotel on January 11, 2015 in Beverly Hills, California. (Photo by Jason Merritt/Getty Images)
LOS ANGELES, CA - JANUARY 09: Sienna Miller seen at LAX on January 09, 2015 in Los Angeles, California. (Photo by GVK/Bauer-Griffin/GC Images)
LOS ANGELES, CA - JANUARY 09: Sienna Miller seen at LAX on January 09, 2015 in Los Angeles, California. (Photo by GVK/Bauer-Griffin/GC Images)
NEW YORK, NY - DECEMBER 15: Actors Sienna Miller and Bradley Cooper attend the 'American Sniper' New York Premiere at Frederick P. Rose Hall, Jazz at Lincoln Center on December 15, 2014 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
NEW YORK, NY - DECEMBER 15: Actress Sienna Miller attends the 'American Sniper' New York Premiere at Frederick P. Rose Hall, Jazz at Lincoln Center on December 15, 2014 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
NEW YORK, NY - DECEMBER 15: Actress Sienna Miller and Director and Producer Clint Eastwood attend the 'American Sniper' New York Premiere at Frederick P. Rose Hall, Jazz at Lincoln Center on December 15, 2014 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
NEW YORK, NY - DECEMBER 15: Actress Sienna Miller is seen on December 15, 2014 in New York City. (Photo by NCP/Star Max/GC Images)
LOS ANGELES, CA - DECEMBER 05: Sienna Miller attends the launch of Just One Eye's Ulysses Tier 1: The Ultimate Disaster Relief Kit on December 5, 2014 in Los Angeles, California. (Photo by Imeh Akpanudosen/Getty Images for Just One Eye)
NEW YORK, NY - DECEMBER 04: Actress Sienna Miller is seen in mintown on December 4, 2014 in New York City. (Photo by Raymond Hall/GC Images)
LONDON, UNITED KINGDOM - NOVEMBER 30: Sienna Miller and Tom Sturridge attends the 60th London Evening Standard Theatre Awards at London Palladium on November 30, 2014 in London, England. (Photo by Fred Duval/FilmMagic)
NEW YORK, NY - DECEMBER 04: Actress Sienna Miller is seen in mindtown on December 4, 2014 in New York City. (Photo by Raymond Hall/GC Images)
LONDON, ENGLAND - NOVEMBER 30: Sienna Miller attends the 60th London Evening Standard Theatre Awards at London Palladium on November 30, 2014 in London, England. (Photo by Karwai Tang/WireImage)
LOS ANGELES, CA - NOVEMBER 22: Sienna Miller seen at LAX on November 22, 2014 in Los Angeles, California. (Photo by GVK/Bauer-Griffin/GC Images)
HOLLYWOOD, CA - APRIL 05: Actress Sienna Miller arrives at the Premiere Of Amazon Studios' 'The Lost City Of Z' at ArcLight Hollywood on April 5, 2017 in Hollywood, California. (Photo by Jon Kopaloff/FilmMagic)
HOLLYWOOD, CA - APRIL 05: Sienna Miller and Charlie Hunnam attend the Amazon Studios and Bleeker Street's Los Angeles Premiere Of James Gray's THE LOST CITY OF Z on April 5, 2017 in Hollywood, California. (Photo by Todd Williamson/Getty Images for Amazon Studios)
British US actress Sienna Miller poses during the photocall before the Christian Dior women's Fall-Winter ready-to-wear collection fashion show in Paris on March 3, 2017. / AFP PHOTO / Patrick KOVARIK (Photo credit should read PATRICK KOVARIK/AFP/Getty Images)
LONDON, UNITED KINGDOM - FEBRUARY 16: Sienna Miller attends the European Film Premiere of 'The Lost City of Z' at British Museum on February 16, 2017 in London, England. PHOTOGRAPH BY Brett Cove / Barcroft Images London-T:+44 207 033 1031 E:hello@barcroftmedia.com - New York-T:+1 212 796 2458 E:hello@barcroftusa.com - New Delhi-T:+91 11 4053 2429 E:hello@barcroftindia.com www.barcroftimages.com (Photo credit should read Brett Cove / Barcroft Images / Barcroft Media via Getty Images)
PARIS, FRANCE - MARCH 05: Sienna Miller attends Chrome Hearts X Bella Hadid Collaboration Launch as part of Paris Fashion Week at Chrome Hearts on March 5, 2017 in Paris, France. (Photo by Julien M. Hekimian/Getty Images for Chrome Hearts)
BERLIN, GERMANY - FEBRUARY 14: Sienna Miller attends the 'The Lost City of Z' premiere during the 67th Berlinale International Film Festival Berlin at Zoo Palast on February 14, 2017 in Berlin, Germany. (Photo by Rune Hellestad - Corbis/Corbis via Getty Images)
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