Aladdin is written by Terry RossioTerry Rossio wrote AladdinAladdin is written by John Musker. John Musker wrote Treasure Planet
[Human]: Hi, could your recommend an older Disney movie? [Assistant]: Aladdin is a good choice.  You might also like The Princess and the Frog or Treasure Planet. [Human]: Both sound good. Who  wrote Aladdin? 
Aladdin was written by Ron Clements and John Musker.  Ron Clements also directed it as well.