Nobertus Riantiarno (better known as Nano Riantiarno or N. Riantiarno; born 6 June 1949 in Cirebon) is an Indonesian actor, director, and playwright. Beginning his acting while in high school, he studied under Teguh Karya, acting in several movies and plays, until eventually establishing his own theatre troupe, Teater Koma, in 1977. His works, with their highly political messages, were often censored by Suharto's New Order government. In 1998 he won the SEA Write Award for his play Semar Gugat.