If you've frozen mango and banana in small pieces previously, it's ideal. Otherwise it'll be necessary to add a bit of crushed ice to the mixture.
Put all ingredients in a blender: mango, banana, yogurt, orange juice and a few drops of vanilla extract. If necessary, add crushed ice.
Mix everything until it's smooth.
If it's not sweet enough, add a bit of honey.
Drink the smoothie very fresh, in a jar with a straw (it's optional, but tastes so much better 😉).