"No words!" Young said after the win. "Thank you so much for everyone for choosing me. I promise to be the best Miss World ever."
Megan, a U.S. native and the first-ever Filipino winner, is an actress studying digital filmmaking. She hopes to become a director.
The first runner-up prize went to Miss France, Marine Lorphelin, and second runner-up to Miss Ghana, Carranzar Naa Okailey Shooter.
The competition made some changes this year following protests by conservative Muslim groups, including asking the women to model sarongs rather than two-piece bathing suits.