James Le Lacheur is currently performing on stage playing Yann Fredericks, who is a new character and is one of Albus Potter's classmates.
James is also the first cover for Scorpius Malfoy, who is the son of Draco Malfoy.
The show opened last week at the Palace Theatre and is staged in two parts, each of which is more than two hours long.
The former Grammar School and Sixth Form Centre student said it was 'brilliant' to be a part of it especially after growing up with the Harry Potter story.