A British doctor studied the relationship between smoking and wrinkling. He found that they were deeply involved. He compared many smokers' and non smokers' skins and found that smokers were nearly five times as likely to be wrinkled as no smokers of the same age and sex.
Smoking prevents sending nutrients via vessels to skin. That helps aging to your skin, so you look older than your age. You can see the damaged face if you google smoker's face on the web.