On Monday, the American Medical Association Alliance called on Hollywood to give any movie depicting smoking an "r" rating.
Movies are now rated based on sexual content, violence and foul language.
But researchers want smoking added to that list to stop teens from taking up the habit.
Talladega nights is a PG13, 2006 hit movie where Sasha Baron Cohen lights up on screen.
The American Medical Association Alliance thinks movies that glamorize smoking should be R rated, and it is pushing the Motion Picture Association to make the change.
The Alliance cites a new poll saying, “This is what most parents want.”
Dr. Robert McMillen of Mississippi State University explains, "70% of adults and parents believe that a movie should be Rated R if it shows smoking unless it's for historical reasons."
The Alliance says their research shows that smoking in movies recruits close to 400,000 adolescent smokers each year, eventually killing over 1/3 of them.
But some parents think an R rating for smoking goes too far.
"It's legal to do. If you're going to do that, I just assume you do That with alcohol," says Jim Nilllus.
Concerned parent Maria Costa agrees, "If we can't teach our kids and grandkids in our homes as they're being brought up that smoking is bad for your health, why are we putting it on someone else?"
But even tobacco companies like Philip Morris have launched campaigns calling on the Motion Picture Association to voluntarily eliminate smoking in movies, acknowledging it can influence a child to light up.
The Motion Picture Association declined to comment on this story.