Finland's nationalist Finns Party came narrowly behind the Social Democrats in Sunday's general election.
Party members celebrated the results at their election headquarters in Helsinki.
Chairman Jussi Halla-aho thanked supporters for their "unbelievable work and spirit" during the election campaign.
With over 97% of the ballots counted, the Social Democrats took 17.8% of the vote, with the Finns Party on 17.6%.
The result means the Finns Party more than double their number of seats, taking 39 in the 200-seat parliament.