[6] Growing up in central Queensland with her five brothers, Scarlett's family moved to Sydney when she was 15 to attend Newtown High School of the Performing Arts.

[5] After finishing her senior schooling, Scarlett began studying a Bachelor of Medical Radiation Science in Nuclear Medicine at the University of Sydney.

[7] Whilst at WAAPA, Scarlett appeared in several shows and played the leading role of Mrs Johnstone in its 2008 production of Blood Brothers.

[5] In 2013, after a series of auditions, Scarlett was cast in the lead role of Sandy Dumbrowski in the Australian production of Grease opposite Rob Mills as Danny Zuko.

"[19] In April 2015, Scarlett was cast in the leading role of Kathy Selden, to play opposite Adam Garcia, in the 2016/2017 Australian touring production of Singin' in the Rain.

In late 2020 amidst the COVID-19 pandemic, Scarlett appeared in the Australian Premier of Pippin at the Sydney Lyric Theatre in the first full-scale musical production to be staged in Australia since COVID-19 restrictions were introduced where she understudied and played the roles of Catherine and Fastrada.

[23] In February, 2021 she then joined the Australian cast of Disney's Frozen the Musical at Sydney's Capitol Theatre to understudy Jemma Rix as the lead role of Elsa.

In 2011, she was selected as one six National finalists in the Third ANZ Trustees Rob Guest Endowment Award, performing live at the gala concert at Her Majesty's Theatre, Melbourne.

[27] In June 2013, Scarlett was invited to sing the Australian National Anthem at Brisbane's Suncorp Stadium at game 2 of the 2013 State of Origin series.

[30] In 2014, Scarlett announced that she was in the process of recording her debut solo album, featuring covers from The Rolling Stones, Queen, and Carole King.

[31] In 2017, a few months after the closing of Singin' In The Rain, Scarlett announced on her official blog and her Instagram that for health reasons, she was taking a break, and on 12 July 2017 she was embarking on hiking the Pacific Crest Trail, 2,659 mi (4,279 km) Southbound from Canada to Mexico.