Finland is set to get its youngest-ever prime minister.

Sanna Marin, 34, won the backing of the Social Democratic Party on Sunday, with 32 votes against 29 for rival Antti Lindtman. The parliament is set to vote on the position on Tuesday.

Marin, the current minister for transport and communications, will preside over a five-party coalition that Sunday agreed to keep working to advance its existing policy program, following the shock resignation of its prime minister last week. She faces a tough task to heal a rift in the Cabinet that emerged as Antti Rinne was forced out on Dec. 3 after his key ally in government lost confidence in him.