Born in Uganda, Kalungi eventually made his way to London to join his family in 2000. From an early age he showed great promise as an actor and at age 17 he was chosen to perform alongside Lucian Msamati(HBO’s Game of Thrones) plus other notable black actors in David Farr's production of Resistible Rise of Arturo Ui at the Lyric Hammersmith. It is here where he was signed by a top Talent Agent from Curtis Brown.
Seeking to hone his craft, Kalungi(formerly Isaac) set aside 3 years to train at The Guildhall School of Music and Drama where in 2019 he graduated with an MA in Acting. Whilst in his final year he was cast in Matthew Xia's production of Blood Knot that saw him receive his first major acting nomination, an OFFIE: BEST MALE PERFORMANCE. Kalungi is now represented by Grace Cavanagh-Butler at Tavistock Wood will be seen in drapetomania a feature film made during the lockdown of 2020.