Finland's troop deployment to Lebanon will probably not take place before November, according to the Defence Ministry.
Finland has pledged to send teams whose main responsibility will be to clear away debris and help restore infrastructure.
The Head of the Defence Policy Department, Pauli Järvenpää, told the newspaper Hufvudstadsbladet that it will take some time to get these teams the proper equipment. This includes bulldozers that can withstand landmine blasts.
Finland's participation will cost around 35 million euros, he added.
The pension sector advocacy association Tela said its board selected Sirén for the job on Thursday.
Allies should not exert pressure on each other or push for the annexation of a partner country's territory, Finland's Prime Minister told reporters in Brussels.
The Hollywood star spoke last year about her Finnish roots and her desire to change her surname to that of her grandfather, Herman Hyytiäinen.
