Sacheen Littlefeather an American activist Dies at 75

actress who famously declined Marlon Brandon's best actor Oscar in 1973

News of Littlefeather's death was shared by the official Twitter account

Her family confirmed Littlefeather died Sunday "peacefully at home"

Littlefeather, who was Apache and Yaqui

She was born Marie Louise Cruz on Nov. 14, 1946, in Salinas, California

She went on to co-found the National American Indian Performing Arts Registry

In 2018, Littlefeather revealed she was battling Stage 4 breast cancer

Nearly 50 years ago, the actress and activist rejected an Oscar

Sacheen Littlefeather an American activist Dies at 75