About Elisabeth Sladen
Elisabeth Clara Miller (née Heath-Sladen; 1 February 1946 – 19 April 2011), known professionally as Elisabeth Sladen, was an English actress. She was best known for her recurring role as Sarah Jane Smith in the BBC series Doctor Who from 1973 to 1976, alongside Jon Pertwee and Tom Baker; she reprised the role with David Tennant between 2006 and 2010 and in spin-offs K-9 and Company (1981) and The Sarah Jane Adventures (2007–2011). Sladen was interested in ballet and theatre from childhood, and began to appear on stage in the mid-1960s, although she was more often a stage manager at this time. She moved to London in 1970 and won several television roles, with her acting in the police drama Z-Cars leading to her being recommended for the role in Doctor Who. After leaving the series, she had other roles on both television and radio before semi-retiring to bring up a family in the mid-1980s. Sladen returned to the public eye in the 2000s with more Doctor Who-related appearances, which culminated in taking a regular lead role in The Sarah Jane Adventures. In 2010, the show earned the Royal Television Society Award for Best Children's Drama. She also made regular guest appearances on the main television series and provided voice-over commentaries and interviews for its releases to DVD. She died of cancer in 2011. She became best known as Sarah Jane Smith in Doctor Who from 1973 to 1976, alongside Jon Pertwee and Tom Baker, before reprising the role with David Tennant between 2006 and 2010 and in spin-offs, K-9 and Company (1981) and The Sarah Jane Adventures (2007–2011).
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.