Robert Pattinson let his heart do the talking in his latest interview for BlackBook magazine. The article, written from the perspective of Pattinson's heart, covers some of the star's most intimate details, including the rumors that he and his "Twilight" co-star Kristen Stewart may be heading down the aisle.

"There was a magazine, with these pictures, saying I was getting married. No one ever knows what is true or what isn't," Pattinson said in the September issue. "Even my own mum called to ask me if it was true. It's not. At least, not yet."

With no wedding to prepare for, Pattinson is taking some time for himself. The actor admitted that he recently went on an "all-liquid diet."

"I had to be shirtless for a photo shoot, so I asked a nutritionist what's a diet in which you can still drink as much as you want. She said a liquid diet." Whether or not it was effective, Pattinson admitted he did see at least one result of the cleanse. "I was so impressed with myself yesterday," he said, "I took a pee that was four minutes long."

Even more impressive is Pattinson's upcoming movie, "Cosmopolis," which hits theatres August 17. In the film, he plays Eric Parker, a billionaire whose world falls apart as he is chauffeured around Manhattan. The film premiered in May at the Cannes Film Festival.

"I lost my mind," Pattinson said about the film's premiere. "I was preparing myself to fight with 1,500 people. I was so amped up. I was just kind of running around with my pants down and my shoelaces untied and, amazingly, not falling. Most people get 15 years of doing movies nobody sees. Now I'm at Cannes."

With this sudden stardom following the release of "Twilight," Pattinson admitted that there were some drastic changes that resulted from his success.

"My circle of friends narrowed pretty quickly, I like to be the parasite, not the other way around," he jokes. "I never go anywhere. I don't even know where 'anywhere' is."