After graduation from the 22nd secondary school in Vilnius, Kubilius was accepted to Vilnius University and studied in the Faculty of Physics until 1979.
He continued his academic career and postgraduate studies at Vilnius University from 1981 to 1984. He later became the Executive Secretary of the Sąjūdis Council. Soon after the re-establishment of Lithuania"s independence, Kubilius was elected to the Seimas (parliament).
Since then Kubilius has been an active figure in Lithuanian politics.
Kubilius led the Homeland Union – Lithuanian Christian Democrats Party into elections on 28 October 2008. Conservatives defeated the Social Democrats, making Kubilius the main candidate for Prime Minister.
On 27 November 2008 Kubilius was officially appointed as Prime Minister of Lithuania. In 2012 Kubilius became the first prime minister of Lithuania, who served the whole term in office.
Kubilius speaks Lithuanian, Russian and English.
He is the leader of the conservative political party Homeland Union – Lithuanian Christian Democrats.
Kubilius became a member of the pro-independence Sąjūdis movement, who favoured separation from the Soviet Union. He became a member of the Homeland Union – Lithuanian Christian Democrats in 1993. He received 89 votes in favour, 27 against, and 16 members of the Seimas abstained.
Married Rasa Kubiliene. 2 children.