Kristjana was born in 1977 and trained in acting at the Malta Drama Centre. She is a psychology graduate from the University of Malta.
She joined the company in 2006 and has been a performer in most pieces, namely Weeds (2006), Lacuna (2006), Everywoman (2007), The Vagina Monologues (2007), Medea (2008), Vuċi għal Kulħadd (2008), Truth or Dare (2009), Appuntamenti (2009), Repubblika Immakulata (2019), Appuntamenti (2019) and Lupu/Nagħġa (2023). In 2021 she performed in Zoom, which won Premju għall-Arti 2022 Innovation Award.
She has made multiple appearances on TV shows and has won Best Female Actor Award at the Malta TV Awards 2007. She currently lives in Malta where she teaches students drama and personal and social development skills.