Thetakudi Harihara Vinayakram (born 11 August 1942), also known as Vikku Vinayakram, is a Grammy Award–winning Indian percussionist. He plays Carnatic music with the ghatam, an earthen pot, and is credited with popularising the ghatam.

He was awarded the Padma Shri, given by Government of India in 2002, and later the 2012 Sangeet Natak Akademi Fellowship, the highest honour in the performing arts conferred by the Sangeet Natak Akademi, India’s National Academy for Music, Dance and Drama. Finally he was awarded the Padma Bhushan in 2014.

Vinayakram was born to Kalaimaamani T. R. Harihara Sharma, a musician and teacher. He took up playing at a very young age.