Jari Arto Olavi "Jaajo" Linnonmaa (born 25 May 1978 in Helsinki[1]) is a Finnish radio personality, actor and entrepreneur.

[2] In 2014, Linnonmaa made his acting debut in a small supporting role as a paramedic in the Finnish medical drama television series Syke on Yle TV2.

In the same year production started on the Finnish comedy film Luokkakokous, in which Linnonmaa has a leading role, along with Aku Hirviniemi and stand-up comedian Sami Hedberg.

[4] Since 2016, Linnonmaa has presented the revival of Haluatko miljonääriksi?, the Finnish version of popular game show Who Wants to Be a Millionaire?.

In 2013, he co-founded MySoda, a distributor of a consumer home carbonation products, which operates in several European countries.