Hollywood star Bradley Cooper says he was worried his directorial debut "A Star Is Born" would "fail miserably". "I was just hoping that I wouldn't fail miserably. It's vulnerable, you know, writing, co-writing, telling a story and directing it. I mean I had no idea what was going to happen," Cooper told etonline.com.

He added: "I just knew that I had to try. So, the fact that it has been well received, I just want savour it." Cooper teamed up with pop star Lady Gaga for the film "A Star Is Born".