Vera Miles was a regular (maybe heavy) smoker during the 1950s and early 1960s, but probably not a chain smoker, considering there is only one candid photo showing her holding a cigarette as far as I know.

This is an excerpt from a 1963 Lydia Lane article discussing how Vera Miles quit smoking:

“My big beauty advice,” Vera Miles said coming right to the point, “is to stop smoking. Every part of me, the way I look, feel and act improved once I gave up cigarettes. You have to have a closed mind not to admit that it is an unhealthy habit.
If ‘it weren’t, they would not forbid smoking to athletes in training, I think a lot of people give up smoking but get frightened when they see how much weight they gain and go back again. When I stopped, I put on 10 pounds the first week. But I wouldn’t go back for anything. I had forgotten how well I could feel and how much I could enjoy life. My whole system was poisoned with nicotine.
My skin did not have good color and neither did my eyes, and I used to wake up in the morning with a fit of coughing and couldn’t wait for that first cigarette. But one day I suddenly seemed to see myself in perspective. It happened in a shower. There I was holding my arm out so my cigarette wouldn’t get wet. I couldn’t even go without one long enough to bathe.
This is slavery I said to myself. I put out that cigarette and resolved never to take another. The first three days were torture. I had terrible headaches and felt ill enough to go to bed. I was addicted and I battled against an invisible enemy that I was determined wouldn’t win.
Then the fourth morning I woke up hungry, my headache was gone and food had never tasted so good. It had been years since I had had such pleasure in eating, and I began to snack all day. My next problem was to decide how I was going to control my weight. Smokers don’t gain because their bodies do a poor job of assimilating what they eat. I began to try diet systems I had heard about."

And a 1970 Lydia Lane article about Vera Miles in which her past smoking addiction is again mentioned:

Vera Miles feels one of the most important decisions of her life was to stop smoking. "No one enjoyed a cigarette more than I did," she said. "I depended on them. When I was tired and hungry. I would smoke. When I was nervous, I would light up. I smoked more than two packs a day."
Vera studied her luncheon menu at Disney’s Studio, where she is starring in “The Newcomers,” before she added, “That was eight years ago. I’ll never go back, but it was two full years before I lost my desire for a cigarette.” Vera’s father was a minister, and at a tender age he impressed upon his beautiful daughter (a Miss America runner-up) the importance of developing character, which he emphasized as self-discipline. His credo for her was, “Once you know what is right, stubbornly adhere to it.” “The first week I gave up cigarettes I put on 10 pounds,” Vera said. “Smokers really don’t like to eat, so when you stop you are able to appreciate food as never before.
Everything; tasted so good again. And I discovered that without the poison of nicotine in my body I was no longer nervous. Another benefit not widely known is that excessive smoking and tooth, decay are related. I many cavities that I had a dental appointment every three months. After I gave up smoking I had no new cavities.
My dentist told me that my reaction was not unusual, that the teeth reflect the state of one’s health, and when your eating habits are bad your gums and teeth will suffer."

Interesting, she was always a heavy smoker. From early in her career. And she is still alive today, and going strong. Almost 100 💯 years old  !..

Vera Miles born in 1930.  Retired from acting. Living in Palm Springs. 95 years old .

Magnifique actrice❤. Magnifique beauté ❤.

Loved her performance in “ 39 Paces to Baker street”, never more beautiful or professional….

I get why she was married 4 times...