Prasanna was born to a upper middle class family in Trichy. His father was an employee in BHEL
and his mother is a housewife. He has a younger brother. Prasanna was
good at mimicry and acting, when he was in school and college. This
quality of him got the first opportunity. He was a EEE student in Saranathan College of Engineering when he responded to an open audition for actors in Susi Ganesan's Five Star. During the filming of Achchamundu! Achchamundu! it was reported that he and actress Sneha were in a affair, but he denied that he has no idea in marrying any actress.