Massoud will play the title character, Scott will portray Princess Jasmine and Smith will play the Genie.
Guy Ritchie is directing the movie, which was penned by John August. Dan Lin is producing.
Aladdin is the latest Disney cartoon to receive a live-action makeover following the successes of Alice in Wonderland, Maleficent, Cinderella, The Jungle Book and Beauty and the Beast.
A live-action Dumbo project was also announced this weekend at the D23 Expo in Anaheim, Calif.
Mena Massoud, Naomi Scott, and Will Smith lead the live-action cast of Aladdin #D23Expo- Disney D23 (@DisneyD23) July 15, 2017