Where are her parents?! Taylor Momsen, 17, puffs away alongside 'Gossip Girl' co-star Matthew Settle

It may be a good thing Matthew Settle isn't Taylor Momsen's real-life father.

The "Gossip Girl" stars were filming in New York City Monday when the 17-year-old actress decided to have a smoke.

Settle, who plays dad Rufus Humphrey to Momsen's Jenny on The CW show, didn't appear to mind that his co-star – who legally can't purchase cigarettes until she's 18 – was puffing away.

Momsen's character has been missing in action for the series' fourth season thus far, but will make a return in the episode airing Oct. 25. She decided to take time off from the show to tour with her band, The Pretty Reckless.

The actress' real-life parents have remained mum, at least in the media, on their teenage daughter's controversial habits.

Momsen has slowly transformed her image from doe-eyed little girl to raccoon-eyed rocker prone to appearing in public scantily clad and talking about X-rated subject matter.

She released a music video in September for her song "Make Me Wanna Die," where she strips until she's virtually naked, and recently spoke with Revolver magazine about her interest in sex tapes and masturbation.

nydailynews.com