How to create a mutable list in Kotlin?

Kotlin has its own keyword to create list which are mutable
As a child I learned that our solar system has nine planets

val planets = mutableListOf("Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune", "Pluto")
println(planets)

In 2006 Pluto was reclassified as a dwarf planet. So let’s remove Pluto

planets.remove("Pluto")
println(planets)