Bradley Cooper shares how he lowered his voice for 'A Star Is Born'

Of all the enchanting things about A Star is Born, one of the most mesmerising has to be Bradley Cooper's distinctly low voice that he manages to maintain throughout the movie.

Well, Cooper let Stephen Colbert in on his secret for how he trained his voice to plummet to new vocal depths. Turns out he drew inspiration from his co-star Sam Elliott.

"One of the things, I knew I wanted to lower my voice. But I didn't want to make him too country," said Cooper. "Sam Elliott is from Sacramento but his mother was from Texas, so he has this accent that you can't quite place. But it's so wonderfully iconic."

Cooper says in order to achieve the Elliott-esque low voice, he'd do a warmup using a tagline. But for the first six months, he could only do it while hunched over.

"I would go to sleep and my throat would hurt and I thought, well this is never gonna happen. That was what I was most terrified of, was his voice," Cooper said. "I always had this warmup line which was a line from an interview [Elliott] did at Sundance which I played him when he came over to my house."

Cooper performed his warmup in the video above using the tagline: "this part here is about as good as it gets for me".

Goodness me, someone give that man an Oscar.