R Zarni was born Zarni Myo Nyunt to Myo Lwin and Kaythwe Nyunt in Yangon on 6 February, 1978. He has a younger brother, Thiha Myo Nyunt, who is also known as M Thiha.
He did his basic education until 1995, after which he started singing and gradually became a well-‐known singer by the year 2000. He got married to One (a.k.a) Myat Thinzar Kyaw in 2003 and they now have a son called Nyan Phone Zarni (a.k.a) Phit Phit Tone (a.ka.) Zachary.
R Zarni continues to earn a living as an artist.