Christine Grennan Stiller was born in the Bronx and grew up in the New York City area. She attended Hunter College in New York City and worked as an International Flight Attendant for Trans World Airlines (TWA).
In 1983, Christine moved to Vermont with her husband Bob and established a sport horse breeding business and was the Coordinator of the Area 1 Young Riders Association. While living in Vermont Christine served as a board member of the Chittenden County United Way and was active on the allocations committee. As president of the Stiller Family Foundation she created scholarship opportunities for Vermont students, and supported programs for local children.
She is continuing her volunteer work in Florida and is currently serving on the Board of the Town of Palm Beach United Way and the Palm Beach Cultural Council.