Shirley MacLaine is one of Hollywood's most iconic actresses but she is also a mom, welcoming her daughter Sachi in 1956.

"I think that's the basis for a long-lasting marriage," Shirley MacLaine tells PEOPLE and Entertainment Weekly Editorial Director Jess Cagle Lindsay Kimble is the Executive Editor, News at PEOPLE.

Shirley MacLaine is one of Hollywood's most iconic ... Steve and Shirley had what they called an "open marriage" for almost ...

Actor siblings Shirley MacLaine and Warren Beatty have both ... “We were friends, and I guess you could say practiced an open marriage, in 1954, which was another lifetime,” she told PEOPLE ...