Frank Bunker Gilbreth, Lillian's husband, died of a heart attack. Lillian never remarried and continued to lead their engineering and management consulting firm.
Lillian Moller married Frank Bunker Gilbreth in Oakland, California. They settled in New York and later moved to Providence, Rhode Island, before relocating to Montclair, New Jersey.
Lillian Moller graduated from the University of California, Berkeley, and became the first woman to speak at a University of California commencement. The title of her speech was "Life: A Means or an End".
Lillian Evelyn Gilbreth, born Lillie Evelyn Moller, was born in Oakland, California. She was the second child and eldest surviving of nine children born to Annie (née Delger) and William Moller.