Known for his roles in franchises like X-Men, His Dark Materials, and IT Chapter Two, McAvoy has built a diverse career, including acclaimed performances in standalone projects like the 2024 horror remake of Speak No Evil.
He explained that early in his career, he auditioned for the part when he had done very little work. His agent advised him strongly against taking it, warning him not to do it and suggesting he pursue other opportunities. Instead, McAvoy chose to perform in a play, earning around 275 pounds a week, which he considers an essential part of his growth as an actor.
He recalled that the offer involved a significant retainer — about 40,000 pounds — and would have kept him from working for nearly seven months. While playing young Tom Riddle might have propelled him into stardom sooner, McAvoy believes passing on the role allowed him to focus on other projects that shaped his career trajectory.

His breakthrough came with supporting roles like Mr. Tumnus in The Chronicles of Narnia (2005), and leading parts in Atonement (2007) and Wanted (2008). His role as Charles Xavier in X-Men: First Class (2011) cemented his status as a franchise star, leading to multiple sequels.
Ultimately, McAvoy’s decision to pass on Harry Potter opened doors for many other incredible roles. While he would have excelled as young Tom Riddle, his current filmography demonstrates that turning down the part was beneficial for his artistic journey and success.