Before joining "Fate: The Winx Saga," Richardson builds a distinguished career across film, television, and theater. She gains early recognition for roles in British films such as "Empire of the Sun" and "The Crying Game," and later appears in international productions including "Sleepy Hollow" and "Harry Potter and the Goblet of Fire." Her work spans drama, fantasy, and historical genres, giving her experience with diverse directors and production scales prior to her role on the Netflix series.

In addition to her film work, Richardson appears in television series such as "Blackpool" and "Counterpart," taking on both leading and supporting roles. She also performs in stage productions, including work with major theater companies, which contributes to her background in live performance and classical material.

Outside of acting, Richardson participates in creative arts projects and continues to work in film, television, and theater, expanding her professional body of work across multiple mediums.