Yes, absolutely.
I think it's kind of naive to believe we are special and alone.
If you think how many stars are out there in the billions of galaxies, each with their own solar systems and possible planets orbiting them, surely there has to be something else.
On the subject of aliens etc, I'm not even convinced we would recognise them/be able to communicate with them if we saw them - especially if they are so far advanced they are able to traverse space.