On Saturday, news broke that Pitt and Theron had been allegedly dating for a month already according to The Sun.
For Angelina's part, it appears to be business as usual for the star despite the romance rumors.
Meanwhile, Brad's ex-wife Angelina Jolie is not Theron's biggest fan as the beauties are reportedly known enemies. "They've been friends for some time, but things have developed", a source told the British tabloid. Oscar-winner Charlize is understood to have visited Brad at his LA home, but has reportedly not met his six children.
Mad Max: Fury Road star Theron parted ways with Penn in 2015 after calling off their wedding.
Charlize would make the first high-profile romantic partner for Brad following his divorce from Angelina Jolie in 2016. Pitt had hosted a screening of the awards season film If Beale Street Could Talk, while Theron was a guest of honour at an event for ROMA.
The 43-year-old Oscar victor had already been at the venue as a special guest for a showing of the film Roma.
"Brad came over to Chateau afterwards, changed his outfit and joined Charlize in a corner of the bar", a source stated.
"They were ridiculously touchy-feely with his arm around her back", the source continued.
One day after claims that they were "casually dating" after being set up by her ex Sean Penn, insiders have insisted that the pair are not "romantically involved".
They went on to dish that 'She's in a pretty good place herself right now and isn't focusing really on anything but herself and her work.
The Hollywood heartthrob quit alcohol after admitting his drinking was the main problem in his marriage to Jolie. She's also been linked to actors such as Alexander Skarsgard and Keanu Reeves.