Who is first to address Aslan in The Chronicles of Narnia the lion the witch and the wardrobe?

The first humans to visit Narnia were Digory Kirke and Polly Plummer, in The Magician's Nephew. The second group was Peter, Susan, Edmund, and Lucy Pevensie who first visited in The Lion the Witch and the Wardrobe and became the Kings and Queens for many years until they accidently stumbled upon England again. A year later they re-entered Narnia in the book Prince Caspian, to save the land from the Telmarines. Edmund and Lucy came a third time with their cousin Eustace Scrubb in The Voyage of the Dawn Treader. Eustace and his friend Jill Pole came back in The Silver Chair. In The Last Battle all but Susan (who'd stopped believing) returned to a glorious new Narnia, and lived in peace forever and ever.