I've mostly seen aliens in movies/books/shows as invaders who want to take take over Earth and all.
So - Which was the first depiction(tv-show/movie/comic book/novel) of aliens as friendly?
Now friendly here can be anything from them just wanting to explore Earth, just wanting to share information or even just wanting to communicate with us basically their motive is not to destroy/rule Earth.
Note: The aliens make the first contact not us because us making the first contact in my opinion would be pointless And
Alien here refers to the common definition, that is a being from another planet in space.