American stars Bradley Cooper and Lady Gaga, in a recent chat, opened up about how they relied on one another while filming A Star is Born. It was Cooper's directorial debut and Gaga's first big screen role.

Talking about the film, the Hangover star said, "The thing that I was aware of from the beginning and I cherish even to this day is how much we both had at stake because it was a first for both of us. We knew that we were really going to have to rely on each other because it's scary putting yourself out there to this degree." Earlier, at the Venice Film Festival, Cooper had admitted that he did not know Lady Gaga was Italian and said their East Coast Italian-American families played a huge part in their bond.