The veteran actress, who is known for her roles in the Harry Potter movies and Mamma Mia!, said that she has definitely sacrificed her "health" due to the pressures involved in the industry.
Walters told The Guardian: "I didn't realise how stressful acting is until I did [BBC film] A Short Stay in Switzerland. There was a collage of my character having all these health tests. A real nurse was doing them, and she said, 'Ooh, your blood pressure's really high.' It was because she had taken it during filming."
She said that being famous has definitely had "its problems", adding that her children have found it strange at times when she has denied being herself just to be left alone.
Walters revealed that there is "a lack of roles for older people" in the acting industry, saying: "It's worse for women, but men suffer it as well. I don't just want to play a functional granny; drama needs to be about a character going through something. I suppose the people having the dramas in life do tend to be younger, but I think that's changing."
She also said that she would like to be remembered "as a good actor, but one who didn't take it all too seriously".
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