Before joining "Heated Rivalry," Nélisse builds an international career in film and television, gaining early recognition for her starring role in "Monsieur Lazhar." Her performance earns critical acclaim and establishes her as a prominent young actress in both Canadian and international productions.

Nélisse continues her career with roles in films such as "The Book Thief," where she plays the lead role of Liesel Meminger, further expanding her presence in major productions. She also appears in television series including "Yellowjackets," working within ensemble casts and long-form storytelling.

In addition to her film and television work, Nélisse appears in a range of projects across genres, collaborating with directors and actors in both independent and large-scale productions. These roles contribute to her development as a versatile performer prior to joining the series.

Outside of acting, Nélisse continues to pursue work in film and television while participating in media appearances and industry events, maintaining an active presence in the entertainment field.