20 celebrities you didn’t know are chain smokers – This will shock many! (With Pictures)

9. Mary Kate Olsen

One half of the Olsen twins, Mary Kate (and her sister Ashley) was essentially born into the spotlight. As the lovable baby on the television show Full House, these twins were needed to play one character because of their infancy. They grew up under the intense glare of public adoration and speculation and while Mary Kate doesn’t act and focuses more on her fashion line, the often too-thin young woman is also a smoker. We’re not sure when she might have started with the habit, but when a person grows up in Hollywood, there are far too many opportunities.