Mimi Mariani was born Troely Callebaut on 8 June 1928, in Malang, Dutch East Indies.

Her last marriage was to Semiarto Suharto, the son of physician Soeharto Sastrosoeyoso and the owner of Titi Murni Pharmacy, in 1961, with whom she had three children.

[1] After the Indonesian National Revolution, Mariani made her film debut by starring in Inspektur Rachman (1950) and in the Indonesian-Philippines production Rodrigo de Villa (1952).

She made her feature film debut in Lenggang Djakarta and then starred in Machluk Raksasa, which was adapted from the Javanese folklore story Timun Mas.

[1] She then starred in Pandji Semirang and Neng Yatimah, credited as Mimiaty, and made an uncredited role in Kassan.

[1] Her last leading role was in Usmar Ismail's directed comedy Delapan Pendjuru Angin (1957), one of three commercial films produced by Perfini.

[1] On 3 January 1958, she appeared in Juliam Bros's directed broadway Because of Dance at the Jakarta Art Building along with Wahid Chan, where she portrayed a middle school girl who fall in love with a dancer.

[1] Mariani was relegated to supporting roles after she returned to the industry, as she was no longer considered suitable for leading parts.

[6] Her two last film credits were a supporting role in Cheque AA (1966) and B-29 (1968), which was released a year before she was diagnosed with lymphoma.