[3] Sproull studied drama at Toi Whakaari in Wellington, New Zealand, graduating in 2011 with a Bachelor of Performing Arts in Acting.
As an actor, Sproull has appeared on television shows Funny Girls, Jono and Ben at Ten, Educators, Fresh Eggs, and Golden Boy.
In 2022, Sproull joined ZM, replacing Megan Papas as the co-host of the weekday breakfast show, alongside long-time radio hosts Carl Fletcher and Vaughan Smith.
Sproull spent time on the breakfast show with Smith and Fletcher in 2021, covering Papas' maternity leave.
She was also nominated for a New Zealand Film Award in 2014 for her part in the short film School Night,[3] as well as winning the Peter Vere-Jones Award for Outstanding Performance at the 2007 Shakespeare's Globe Centre NZ University of Otago Sheilah Winn Shakespeare Festival, for her portrayal of the titular character in Richard III.