Entertainment Weekly first reported the death - announcing the actress' daughter Rachel Stirling, confirmed that her famous mum Rigg was diagnosed with cancer in March.
In the statement, Rachel said Diana "spent her last months joyfully reflecting on her extraordinary life, full of love, laughter and a deep pride in her profession.
I will miss her beyond words." “It is with tremendous sadness that we announce that Dame Diana Rigg died peacefully early this morning," her agent Simon Beresford said in a statement. "She was at home with her family who have asked for privacy at this difficult time.
Dame Diana was an icon of theatre, film, and television. She was the recipient of BAFTA, Emmy, Tony and Evening Standard Awards for her work on.
Read more on lifestyle.com.au