She received a Golden Globe in 1954 as that year’s rising star and appeared in movies alongside Dean Martin, Frank Sinatra and Paul Newman.

Barbara Rush, the supremely poised actress who rose to fame with supporting roles in 1950s films like “Magnificent Obsession” and “The Young Lions,” died on Sunday at her home in Westlake Village, Calif., in Los Angeles County. She was 97.

The death, in a senior care facility, was confirmed by her daughter, Claudia Cowan.

If Ms. Rush’s portrayals had one thing in common, it was a gentle, ladylike quality, which she put to use in films of many genres. She was Jane Wyman’s concerned stepdaughter in the 1954 romantic drama “Magnificent Obsession” and Dean Martin’s loyal wartime girlfriend in “The Young Lions” (1958), set during World War II. In 1950s science fiction pictures like “It Came From Outer Space” and “When Worlds Collide,” she was the small-town heroine, the scientist’s daughter, the Earthling most likely to succeed.

In both “The Young Philadelphians” (1959), with Paul Newman, and “The World in My Corner,” a 1956 boxing film with Audie Murphy, Ms. Rush was the prized rich girl. In “Bigger Than Life” (also 1956), with James Mason, she played a vapid but supportive wife. And in “Come Blow Your Horn” (1963), with Frank Sinatra, she played the only “nice girl” in a swinging Manhattan bachelor’s life.

But she did transcend type occasionally, as an Indian agent’s bigoted wife, for instance, in the western “Hombre” (1967), with Paul Newman. She also played Kit Sargent, the Hollywood screenwriter attracted to and repelled by the ruthless title character in the classic 1959 television production of “What Makes Sammy Run?”

For much of her career, Ms. Rush was treated as a pretty face more than a serious actress. But she did receive a Golden Globe in 1954 as most promising newcomer, and she won the Sarah Siddons Award as Chicago’s top actress of the 1969-70 season for her stage role as a mature woman courted by a younger man in the Jay Presson Allen comedy “Forty Carats.”