AceShowbiz - It seems like Brad Pitt has to quit smoking as soon as possible. A new report suggests that his kids are "freaking out" over his nicotine addiction.

"Brad was vaping for a while, but lately he's gone back to smoking up to two packs of cigarettes a day," says a source to Radar Online. "No one's more worried about this than his kids."

The insider goes on saying that the kids, whom the "Mr and Mrs Smith" star shares with ex Angelina Jolie, are "all extremely health conscious and have been taught from an early age that smoking is terrible, even though both their parents have been smokers on and off their whole lives."

"Angie managed to quit a couple of years back and the kids were so proud, but Brad's still hopelessly dependent and it’s gotten them worried sick," the informant adds.

It seems like Brad getting back to cigarette has something to do with his long divorce and custody battle with the "Maleficent" actress. The 55-year-old actor reportedly has been under a lot of stress in the past few years.

This is somehow ironic since previous report said that Brad used to hate Jennifer Aniston's smoking habit when they were still together. Model April Florio, who was rumored to have a fling with Brad when his marriage to Jen hit rock bottom, claimed that "he hated his wife's chain-smoking."

The model, who claimed Brad tried to kiss her during a three-day stay in Greece in 2003, also said that the Academy Award-nominated actor complained that Jen preferred to stay in the house than go out in the night. "He also hated the fact that she liked to hang with her friends or just stay at home. He liked to go to parties more," so she said.