The upcoming movie is a remake of Disney's 1998 animated movie of the same title. It joins other Disney animated classics recently turned into live action films, such as "Beauty and the Beast," "Aladdin" and "The Lion King."
Many who viewed the trailer tweeted their reactions.
Some seemed disappointed that one character from the 1998 film appeared absent: Mulan's small dragon sidekick, Mushu.
Mulan is set to hit theaters in March 2020