Kalu was born in England but was relocated to Nigeria by his dad at the age of 9 due to fears from his parents that he might abandon his Igbo roots.

[5] He had his primary education in England and Zambia before proceeding to University of Nigeria to get a degree in English Literature.

He has gone on to act in some of Nigeria's memorable classics, such as "Major Lejoka Brown" in Ola Rotimi's, Our Husband Has Gone Mad Again and as "RIP" in Esiaba Irobi's Hangmen Also Die.

On television, he has starred in many popular series including Domino, 168 and Doctors' Quarters (MNet Production).

[9] The main challenge he had as an early actor was the point where he had to switch from acting on stage to television.