Lanny was born of Chinese descent in Surakarta on 13 November 1944, with the name Goei Giok Lan.

During her junior high school years, she learned judo from Battling Ong and was able to reach the brown belt level.

[2] In the 1961 National Sports Week [id] in Bandung, she won a gold medal in the diving competition for the 3-meter board.

[1] Lanny participated in the 1962 Asian Games in the diving event and won gold medals for the 3-meter board and the 10-meter platform.

[5] Lanny carried the torch at the Gelora Bung Karno Stadium during the opening of the 2018 Asian Games.