Bradd Pitt has not been in the news lately, since he focused his attention to his family. The actor has smoked for years until he decided to quit for his loved ones and his own health. Recently, he admitted that quitting isn't easy as he's suffering complicated withdrawal symptoms. He claims he had been irritable and "deeply miserable."

Pitt's smoking withdrawal is not the first time for the actor. He tried quitting many times in 2015 and even in the previous years. The 51-year-old "Fury" star claimed that he finds quitting smoking really difficult. Just like a normal person, he also experiences withdrawal symptoms that affect his moods. Angelina Jolie's husband even said that initially, he really missed his packet of cigarette, Movie News Guide reports.

"(It has been) deeply miserable," he told New York Post. "I really missed cigarettes. Withdrawal was so hard, I was ready to kill. My trainer warned (me) every day would be unpleasant. He was right."

In his interview, Pitt revealed that smoking was not the only thing he gave up for the sake of his family. He claimed that he previously quit smoking marijuana when he became a father to their adopted son, Maddox, News Everyday reports.

"I quit smoking (marijuana). That (having kids) was the only thing that got me to quit. That was it. Done," he once said.

Meanwhile, Pitt has begun working on his new film, "The Lost City Of Z," in August 2015. Since then, rumors that he's been flirting with his co-star Sienna Miller has hit the headlines. According to Celeb Dirty Laundry,  Jolie thinks that he is giving special attention to Miller, which is why Jolie is starting to doubt his faithfulness. However, Pitt has dropped his role in the film, and is reportedly working for the production instead.

"Angelina has heard Brad bring up Sienna's name almost every day since the film went in to production in August. Brad told her to let him do his job as a producer, and Angelina yelled that she didn't want him near Sienna. They barely spoke to each other the next day," an insider claimed.