Sylvia O'Brien (1924-2006) was a Dublin-born, New York-based actress who starred in Broadway theater productions, as well as commercials and television programs. O'Brien was born in the Rathmines suburb of Dublin, Ireland in 1924 and emigrated to the United States in 1959 following her involvement with the travelling Irish Festival Singers. In 1959, she married Richard Seadar, the American road manager for the Irish Festival Singers tour. A member of Actor's Equity Association, the Screen Actors Guild, and the American Federation of Television and Radio Artists (AFTRA), O'Brien appeared in numerous Broadway productions, including a role as Mrs. Peace in the 20th anniversary production of My Fair Lady. In addition to her acting career, O'Brien also wrote poetry and short stories, many of which were published in American and Canadian magazines. She died in 2006.