Mr Mungau died in Port Vila on January 5 after developing an infection in a leg wound that wasn't treated.
The Associated Press reports Mr Mungau, in his mid-20s, earned a role in the Oscar-nominated film Tanna, because his elders decided he was the best-looking guy in Yakel.
Tanna co-director Martin Butler said Mr Mungau was enthusiastic, learned quickly, and ended up giving a fabulous performance.
The movie won a number of awards, including two at the Venice Film Festival.
He is survived by his wife and two children.