Helen was married to playwright Charles MacArthur until his death in 1956.
Helen's sound film debut was in The Sin of Madelon Claudet.
Helen has an adopted son, James MacArthur, who is a stage actor.
Helen won the first ever Tony Award given for acting, in 1947.
Helen was a supporter of the Republican Party and attended many Republican conferences.
Helen hosted the 44th Academy Awards alongside Sammy Davis Jr., Alan King and Jack Lemmon.
Helen is one of only twelve actors to win a Grammy, an Emmy, an Academy Award, and a Tony Award.
In honour of Helen's contribution to theater, the lights of Broadway were dimmed for one minute at 8:00 p.m. on the day she died.
Helen received the Women's International Center (WIC) Living Legacy Award in 1985.
Helen has a star on the Hollywood Walk of Fame at 6220 Hollywood Blvd.
Helen: I must refrain from talking too much about retirement. It's beginning to sound absurd.
Helen: The hardest years in life are those between ten and seventy.
Helen: Age is not important unless you're a cheese.
Helen: If you rest, you rust.
Helen Hayes: I seem always to have reminded people of someone in their family. Perhaps I am the triumph of Plain Jane.
Helen: Every human being on this earth is born with a tragedy, and it isn't original sin. He's born with the tragedy that he has to grow up. That he has to leave the nest, the security, and go out to do battle. He has to lose everything that is lovely and fight for a new loveliness of his own making, and it's a tragedy. A lot of people don't have the courage to do it.