Adrian Grenier has said that he would "almost give a money-back guarantee" if Entourage fans do not enjoy the feature film.

Speaking to People, the 38-year-old actor said: "If anybody doesn't like this movie, they can tweet me, and I will consider giving them their money back... If they can give me a reason that I think is legitimate."

Grenier said of bringing the show to the big screen: "The show, I always felt, was larger than the size of our televisions.

"I think people also appreciated the fact that it is this really cinematic experience… So this, I think, is more appropriate to what the show always wanted to be, which is bigger, longer, more of the gang."

The film, which is set for release in July, picks up where the HBO series left off in its final episode in 2011, and Grenier added that it was not hard to go back to playing Vince Chase. 

"It's like a family reunion," he said. 

"You don't really need to think about how to act when you show [up] seeing people you love and care about and worked together with forever."

Grenier added: "They did schedule in some reunion time early during the shooting because, of course, when you first come back together, there's a lot of hugs and catching up to do. So a good several hours was cut into our film time with people talking and catching up."