Deepika Priyadarshani was born on 13 July in Kalubowila as the third child of the family. Her father, Sumanadasa Peiris was an engineer. Her mother Karuna Peiris is a retired nurse. She completed education at Anula Vidyalaya, Nugegoda. She has one elder brother, Ajith Peiris and one elder sister, Ajantha Peiris who died when she was 3 years old. Her youngest sister is Shalika Peiris. At early times, her mother had gone to sing for various programs on Sri Lanka Radio. Mother's sister Priya Gunawardena is also a singer.

 

She obtained Bachelor of Music Education (1st class) Vocal Visharadh, (1st class) from Bhatkhande University, India in 1990 and Master of the Arts in Mass Communication from University of Kelaniya in 2007. Later she obtained Bachelor of Education in 2002.

 

On 15 August 2018, Deepika married longtime partner Chamika Herath, a banker by his profession. Also as a lyricist, Chamika composed many famous songs such as Maga Denethata Denatha Thea sung by Deepika.