Kuustonen was born in
Helsinki, where she studied at the
Helsinki theatre academy, and graduated with a master's degree in acting in 2011. Kuustonen has done a lot of work in theatres, and for example performed as the second lead
Pirkko Mannola in the musical
Pirkko & Åke at the summer theatre of Valkeakoski in summer 2010. She has also performed in
Ronia, the Robber's Daughter at Suomenlinna summer theatre in 2011, and in Espoo city theater's musical
Kojoottikuu in 2014. She has also done a lot of Finnish dubs to movies, including
Kung Fu Panda (2008),
How to Train Your Dragon (2010) and
The Croods (2013). Finnish musician
Mikko Kuustonen is Iina Kuustonen's father. Iina's sister Minka Kuustonen is also an actress. Kuustonen was engaged to
Sebastian Rejman but in June 2022 the couple announced that they have separated. Together they have a son born in September 2016 and a daughter born in February 2019. == Filmography ==