Esta TerBlanche, a South African actress best known for her role on “All My Children,” died on Thursday in Los Angeles. She was 51.

Her death was confirmed by her publicist, Lisa Rodrigo. An autopsy report from the Los Angeles County Medical Examiner was pending, Ms. Rodrigo said.

The Los Angeles County Medical Examiner did not immediately respond to requests for comment.

From 1997 to 2001, Ms. TerBlanche played Gillian Andrassy, a Hungarian princess who is sent to live with her cousin. Her enemies-to-lovers story line with Ryan Lavery, played by Cameron Mathison, was popular at the time.

Esta TerBlanche was born on Jan. 7, 1973, in Rustenburg, South Africa.

She began her career at 16 years old as the host of a television show for children called “K-T.V.” and a math show called “Math No Problem,” she said in an interview in April on the podcast “Conversations With Nicole.” In 1991, she was crowned Miss Teen South Africa.

Ms. TerBlanche landed a recurring role as Bienke Naudé Hartman on South Africa’s longest-running soap opera, “Egoli: Place of Gold,” about three families in Johannesburg that are steeped in drama, sex, scandal and intrigue, according to News24 in South Africa.

She moved to the United States when she was 23 to pursue acting. In the podcast interview, she recalled arriving at Los Angeles International Airport with two suitcases and a stomach full of fear and doubt, wondering whether she should go home.