Seagram is the daughter of Harry Brower, a New York City police detective. She worked as a graphic Artist after graduating from college. Acting on a friend's suggestion, she began working as a model. After someone suggested that she "looked like an actor", she studied drama for three years, which led to a small role in Shadows (1959).
After retiring from acting, Seagram first sold commercial real estate. In the 1980s, she created Actors 2000, teaching acting in Hawaii. She later moved the school to Los Angeles.
