Dr. Richard F. Daines, the state health commissioner, defended the campaign, which began running on television, in newspapers and on the Internet in November and ends Jan. 22.
"Here's someone who's willing to step forward and show his weaknesses in public," Daines said. "I think it took a lot of courage."
A message left for Legault on his home phone was not immediately returned.
But in an interview with the Daily News, which first reported the story, he said, "I don't tell anyone to quit smoking. I tell people the effects smoking does to me and people I've been in contact with."
Legault, who once smoked three packs a day but has cut back to half a pack, was paid $4,000 for his time in producing the ads, the health department said.