VIDEO: Diane Keaton Talks About Her Brother on GOOD MORNING AMERICA

The Hollywood legend reveals in her book, "Brother and Sister," that her brother struggled with mental illness and alcohol just as her career was taking off.

Watch the clip from "Good Morning America" below!

Every weekday 7 a.m. - 9 a.m. GOOD MORNING AMERICA brings you the latest breaking news, expert analysis, helpful advice for everyday living, recipes from the best chefs in the country and live performances from the best musicians on television.

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