Bradley Cooper embarrassed by De Niro closeness

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Bradley Cooper, Abbie Cornish, and Robert De Niro star in this 2011 techno thriller based on the novel The Dark Fields by Alan Glynn. The main character is a struggling writer by the name of Eddie Morra (Cooper). At a low point in his life both personally and professionally, he decides to try an experimental drug that allows him to use 100 percent of his mind. As a result he becomes a so-called perfect version of himself, and his success eventually catches the eye of business mogul Carl Van Loon (De Niro). Though it seems like Eddie has the world at his fingertips, he's about to learn that he's not completely in control.
May 9th, 2011

Bradley Cooper feels embarrassed by his closeness to Robert De Niro.

The 'Hangover' star worked with the acting legend on new movie 'Limitless' and though he would find it "weird" to refer to his co-star by anything other than his nickname 'Bobby', he feels uncomfortable mentioning their bond.

He said: "Unfortunately, yes, I do only think of him as Bob now, which is the most awful thing when you're watching people in interviews talking about 'Marty' or 'Bob' - you just want to throw up.

"But it would be weird for me to call him Robert."

Bradley, 36, recently admitted he can't stop mimicking De Niro since they worked together.

Bradley said: "It's like osmosis. You can't be around that guy without starting to take on his mannerisms. And I started to worry that during the scenes that I had with him I'd start doing him - to him - in the scenes. Not even consciously.

"So much so that when we started filming 'Hangover' part two - like when we're in Bangkok and I'm talking to Alan, and he's like 'Cut! Dude, you're doing De Niro.' I'm like, 'I know, it's crazy.' "