Dennis Quaid quit smoking when his twin babies were born last year (07) - and he's determined this time will be for good. The movie star admits he's tried to quit many times, without success, but so far his babies have kept his nicotine urges at bay. He tells Outside magazine, "I quit smoking when the kids were born. I've gone over two months, and this is the one. "I've quit a hundred times, but I've really quit this time because I want to be around for them."