Cummings is also known for her roles as Dorothy Williams in ABC1's Miss Fisher's Murder Mysteries, as Debbie Vickers in Puberty Blues, as Vic McQueen in NOS4A2, and as Abby Conroy in the spy action thriller series Citadel.

[5][9] Cummings' next projects were a role in the television film Dream Life and a guest stint in soap opera Home and Away.

[10] In September 2009, it was announced Cummings had joined the cast of Tomorrow, When the War Began, a film based on the John Marsden book of the same name.

[6] Cummings earned a nomination for Best Young Actor at the 2010 Australian Film Institute Awards for her portrayal of Robyn Mathers.

[14] Cummings went overseas for three weeks to work as a volunteer in South-East Asia, before she returned to film the second series of Miss Fisher's Murder Mysteries.

[14] For her roles in Miss Fisher's Murder Mysteries and Puberty Blues, Cummings received a nomination for Most Popular Actress at the Logie Awards.

[17][18] Cummings received a nomination for Best Performance by a Young Actor at the Film Critics Circle of Australia Awards for her role in Galore.

[24] In 2023, she began playing Abby Conroy in the American spy action thriller series Citadel for Amazon Prime Video.