Hello! The best movie of all time for a 13 year old girl would likely be a movie that is age appropriate and entertaining. A great choice would be the Disney classic, The Lion King. This movie has been around since 1994 and is still beloved by many. It has a great story line, memorable characters, and catchy songs that will stay with you long after the movie ends. It also has a strong message about family, loyalty, and friendship that resonates with viewers of all ages. The Lion King is an excellent choice for any 13 year old girl looking for an enjoyable movie experience.