Lena Dunham Surprises Brad Pitt With a KISS at 'Once Upon a Time in Hollywood' Premiere

Lena Dunham has balls of steal because she grabbed one of the hottest A-listers in Hollywood and planted a big fat one on him.

Dunham grabbed a surprised Brad Pitt and kissed him on the red carpet of "Once Upon a Time in Hollywood" during the premiere in London on Tuesday night.

The actors are both in the newly released Quentin Tarantino film and Dunham was very strategic how she went about the kiss.

Here is she separated from Pitt by several of their co-stars. He appears to be talking to Tarantino, Leo DiCaprio and Margot Robbie, but that didn't stop the former "Girls" actress from keeping all eyes on him.

Dunham, who plays one of Charles Manson's cult followers in the film, bypasses her co-stars and heads straight for Pitt's unsuspecting lips.

Putting his arm around her as if to give Dunham a hug, she's clearly ready to go in for the kill.

She appears to head straight for the lips and maybe gets half mouth contract before Pitt turns his cheek.

It's a ballsy move for the star to come at the Oscar winner so aggressively, but it's no surprise because just days ago she admitted that flirting with him on the "Once Upon a Time in Hollywood" set was a career highlight.

"It's not every day I get to wear a mumu, go barefoot, flirt with #BradPitt, and join a cult ... as a job," Dunham tweeted this past Friday.

In the film, Pitt plays Leonardo DiCaprio's character's stunt double, who ends up at Manson's ranch where Dunham and the other cult members are staying.

Spoiler -- she doesn't seduce him in the film either.