Diane Murphy (born June 17, 1964) is a former child actress, best known for sharing the role of "Tabitha" with her fraternal twin sister Erin in the 1960s television series Bewitched for one season. Erin then took over the part for the remaining 6 seasons. Diane left the entertainment industry at age thirteen and never returned. She later earned an MBA.
Appeared less and less in Bewitched (1964) when she and fraternal twin sister Erin Murphy, with whom she initially shared the role of Tabitha, started to look less alike. Her last appearance was in the fifth season, although she returned to the show in other small roles.