He is born as Ajay Kumar, as the eldest son, of Radhakrishnan and Ambujakshiyamma, on 31 August 1976 at Mulavana, Kundara, Kollam. His father was an auto driver and mother was a L.I.C agent who also worked at Telephone service agency on contract. Soon after his birth his family moved to Kottayam. Since his mother often got transferred they moved from one place to other and finally settled at Pandavam, Aymanam, Kerala. He has two younger sisters, Kavitha and Sangeetha. He studied at C.M.S L.P School, Chalukunnu till his fourth grade and at C.M.S High School, Olassa till S.S.L.C. Then he joined Baselius College, Kottayam and completed his pre degree and graduation from there. He is a BA graduate in economics and has a diploma in computer science. He started his career as a mimicry artist and later moved to films. He worked as a mimicry artist in mimicry troupes like Mangalam Mimics, Nadirsha's Cochin Universal and Kottayam Nazeer's Cochin Discovery. By the time he reached 18 years of age he completed 1000 mimicry stages. He debuted through the children’s film Ambili Ammavan (The Moon) in 1984. He now also acts in TV serials. Pakru married Gayathri Mohan in March 2006. They have a daughter Deeptha Keerthi born in 14 April 2009.
His first film Ambili Ammavan. He was well appreciated for his talents and did a small role in the movie ‘Ambili Ammavan’ in 1985. His height is only 2 feet 6 inch, but he played the role of hero in the Malayalam movie Albhuthadeep (Wonder Island) in the year 2005. ‘Albhuthadeep’ is a movie that consists of 300 dwarfs – a unique record. The movie Joker in 2000 gave him wide appreciation and very soon, he became busy in Malayalam film industry. He did comic roles in mega blockbusters of Dileep in the year 2002, the movies which made Dileep a superstar – Meesa Madhavan and Kunjikoonan. His roles were well appreciated and the beautifully choreographed song of Meesamadhavan, in which Pakru danced, was awarded for best choreography in V.Shantharam awards 2003. Albhutha Dweep followed these movies and then he did numerous films in small roles.