LONDON — Diana Rigg, a British actress who became a 1960s style icon as secret agent Emma Peel in TV series “The Avengers,” has died. She was 82. Rigg’s agent Simon Beresford said she died Thursday morning at home with her family. Daughter Rachael Stirling said she died of cancer that was diagnosed in March. Rigg “spent her last months joyfully reflecting on her extraordinary life, full of love, laughter and a deep pride in her profession.