McGahan has appeared in Australian film, television and theatre. Her most notable appearance to date is starring as
Nellie Cameron in the hit Australian TV series
Underbelly: Razor, in which she plays a 16-year-old 1920s
prostitute from a wealthy background who influenced some of the era's most powerful men, for which she won the
Inside Film 'Out of the Box' Award, was shortlisted for the
Queensland Premier's Drama Award and was nominated for two
Logies. In 2012 she received a 'Best Emerging Artist'
Matilda Award for her performance in
La Boite Theatre Company’s Julius Caesar. McGahan appeared in the 2012 film
100 Bloody Acres and Australian TV series
House Husbands on the
Nine Network in the same year. On 27 June 2012, McGahan was awarded the
Heath Ledger scholarship at the
Australians in Film benefit in Los Angeles. In 2014 she played Sister Olive Haynes in
ANZAC Girls, a six-part miniseries for
ABC Television that was based closely on real characters from the Australian and New Zealand nurses and troops who served in World War I. McGahan plays opposite
Brandon McClelland, as the Australian soldier
Norval 'Pat' Dooley, who married Haynes in 1917. In May 2021, McGahan played Katharina in William Shakespeare's
The Taming of the Shrew with
Queensland Theatre (in the
Bille Brown Theatre, Brisbane), directed by Damien Ryan.
Petruchio was played by
Nicholas Brown. In 2023, McGahan was named as part of the cast for
ABC musical drama
In Our Blood. McGahan is also a
playwright and published author. She won the
Queensland Theatre Company Young Playwright's Award in 2009 and 2010, and was shortlisted for the Queensland Premier’s Drama Award in 2011 for her play ''He's Seeing Other People Now'', which she produced through the
Metro Arts Independents Season in Brisbane. Together with Joel McKerrow, she co-wrote the theatre piece
The People of the Sun, which toured Melbourne and Sydney in 2016 and 2017. In 2023, she won
The Australian/Vogel Literary Award. for her debut novel
Immaculate, which was also shortlisted for the 2024 MUD Prize and 2024
Queensland Literary Awards 'Book of the Year'. She is adapting the novel for the screen with funding from
Screen Queensland. Her novel
Metanoia, was shortlisted for the international ECPA Award for Best Memoir/Biography. She has also been published by
Griffith Review,
The Guardian and
Mamamia. ==Personal life==