Cartoon duo Tom and Jerry have been investigated by media watchdogs for lighting up on screen.
In one episode, Tom smoked a roll-up cigarette in a bid to impress a female cat.
In another, Tom's opponent in a tennis match was seen smoking a large cigar.
A viewer complained about the cartoons aired on children's channel Boomerang, saying they were not appropriate for young viewers.
Media regulator Ofcom investigated and the channel agreed to edit out scenes in future which glamorise or condone smoking.
"We recognise that these are historic cartoons, most of them having been produced in the 40s, 50s or 60s, at a time when smoking was more generally accepted," Ofcom ruled.
"We note that, in Tom and Jerry, smoking usually appears in a stylised manner and is frequently not condoned.
"However, while we appreciate the historic integrity of the animation, the level of editorial justification required for the inclusion of smoking in such cartoons is necessarily high."
Boomerang is part of Turner Broadcasting. Its audience is made up mainly of children - 56 per cent of viewers are aged four to 14.
Ofcom's report said that Turner had "conducted an extensive internal review of the Tom and Jerry library to reassess the volume and context of smoking in these cartoons".
Turner has proposed to edit any scenes or references "where smoking appeared to be condoned, acceptable, glamorised or where it might encourage imitation".
But smoking scenes may not be edited from the screen in every instance.
"Turner believed... that editing out all references to smoking, where such references neither glamorised nor condoned, might adversely affect the value of the animation," Ofcom said.
"Given Turner's commitment to adopt a precautionary approach, we welcome its review of archive material and action taken to minimise the possibility of harm."
Turner Broadcasting is also planning to edit out smoking scenes from classic Hanna Barbera cartoons including Scooby Doo, The Jetsons and The Flintstones.
In a statement to the Mediaguardian website, the company said: "Turner recognises that it is not suitable for cartoons aimed at children to portray smoking in a cool context and has additionally pledged to review the entire Hanna Barbera catalogue to remove scenes that appear to glamorise or encourage smoking."