Princess Stella Sigcau (4 January 1937 or 14 January 1937 – 7 May 2006) is best known as a Minister in the South African Government. Sigcau was also the first female Prime Minister of the Transkei before being deposed in a military coup in 1987.
She was the daughter of King Botha Sigcau of the AmaMpondo tribe who was a former President of the Transkei in 1976-1978. Her brothers are King Thandizulu Sigcau and the late ANC activist and Member of Parliament NKosi Ntsikayezwe Sigcau. She named Nkosi Ntsikayezwe Sigcau's daughter HRH Princess Stella Sigcau II (Founder: Lwandlolubomvu Rural Development Project; Founder and Festival Director: Ntsikayezwe Lamampondo Cultural and Heritage Festival) after her. Sigcau graduated from the Loveday Institute in 1954 before marrying Ronald Tshabalala in 1962. She taught in a number of schools in Natal during the 1960s.
In 1968, she was elected in Transkei representing the seat of Lusikisiki. Prior to the granting of independence, she held a number of portfolios. After independence, she held the portfolios of Interior Affairs and Posts and Telecommunications. She became the leader of the Transkei National Independence Party on 5 October 1987 and became the third Prime Minister of Transkei two days later. Her term as Prime Minister did not last long as she was overthrown in a coup by General Bantu Holomisa.