Sylvia Anderson (née Thamm, born 25 March 1927) is a British television and film producer, writer and voice actress, well known for her collaborations with Gerry Anderson, her husband between 1960 and 1981. In addition to serving as co-creator and co-writer on their TV series during the 1960s and early 1970s, Sylvia's primary contribution was character development and costume design. She regularly directed the bi-weekly voice recording sessions, and provided the voices of many female and child characters, in particular "Lady Penelope" in Thunderbirds. The Andersons divorced at the start of the 1980s following a five-year separation.