Ann Rutherford, the demure brunette actress who played the sweetheart in the long-running Andy Hardy series and Scarlett O'Hara's youngest sister in "Gone With the Wind," has died. She was 94.

A close friend, actress Anne Jeffreys, tells the Los Angeles Times that Rutherford died Monday night at her home in Beverly Hills. She had heart problems and was in declining health.

The Andy Hardy series, a hugely popular string of comical, sentimental films, starred Lewis Stone as a small-town judge and Mickey Rooney as his spirited teenage son.

Rutherford first appeared in the second film of the series, "You're Only Young Once," in 1938, and she went on 11 more. She played Polly Benedict, the ever-faithful girlfriend that Andy always returned to, no matter what other, more glamorous girl had temporarily caught his eye. (Among the other girls: Judy Garland and Lana Turner.)

It was said she won the part of Carreen -- the youngest of the three O'Hara sisters in "Gone With the Wind" -- because Judy Garland was filming "The Wizard of Oz."