Perttu Päivö Kullervo Kivilaakso (born 11 May 1978 in Helsinki, Finland) is a cello player for Finnish band Apocalyptica. Like fellow band members Eicca Toppinen and Paavo Lötjönen, he attended Sibelius Academy in Helsinki. He plays a German 19th century cello; he started playing the cello when he was 5 years old and joined Apocalyptica for their third studio album Cult.