The Los Angeles photocall for Once Upon A Time In Hollywood brought back together castmates Leonardo DiCaprio, Margot, Brad and director Quentin Tarantino.
Photographers caught the hilarious and memorable moment when Brad, 55, jumped in front of cameras.
Cameras also caught Margot's stunned and stupefied face as the father of six surprised her.
- 21 Celebrity Death Hoaxes: Brad Pitt, Celine Dion, Jackie Chan and More
- Angelina Jolie Was 'Stuck in a Rut' During Drawn-Out Divorce From Brad Pitt: 'She’s Finally Moved On'
- Brad Pitt Is Worried Daughter Vivienne Becoming Angelina Jolie's Assistant on Broadway Will Create a 'Whole New War' in Custody Battle
The upcoming comedy-drama takes place in 1969 around the time of the infamous Manson Family murders. Brad and Leo star in the movie as best friends and actors who are struggling to adapt to a changing Hollywood. Margot portrays the slain Sharon Tate who was murdered by the Mansons.
Luke Perry, Al Pacino, Dakota Fanning and Austin Butler round up the ensemble cast.
Once Upon A Time In Hollywood opens in theaters on July 26.
What are your thoughts on Brad's photobomb? Sound off in the comments below!