Jennifer L. Siebel (born 19 June 1974) is an American actress. She has appeared in several TV shows as guest star and has had roles in several films including April Fool's Day.IMBD Profile Siebel earned her undergraduate degree and MBA from Stanford University. She worked for environmental group Conservation International. Her father Ken Siebel is an investment manager and her mother Judy co-founded the Bay Area Discovery Museum in Sausalito. On July 26, 2008, she became the first lady of San Francisco by marrying Mayor Gavin Newsom. It is her first marriage.news.yahoo.com/s/ap/20080727/ap_on_re_us/people_newsom;_ylt=Apd46HPf9qxq00_HKxqWijPBF4l4