Vilnius - President-elect of Lithuania Dalia Grybauskaite said Monday that her main diplomatic efforts would be "development of a balanced foreign policy" and "helping to democratise the neighbourhood."

The outgoing European Union Financial Planning and Budgets Commissioner, who returned to her homeland to contest the presidency, also said she would aim to increase EU investment in the country and predicted Lithuania would adopt the euro as its currency some time between 2012 and 2015.

A smiling Grybauskaite joked with photographers as she arrived at a morning press conference hours after she won a landslide victory. But soon she was showing why she has a reputation for straight- talking as she spoke out on a number of topics.

Grybauskaite singled out the current Lithuanian ministers of finance, energy and social services as under-performers, increasing the chances that she will ask Prime Minister Andrius Kubilius to replace them when she is inaugurated in July.

Asked earlier about her priorities on domestic policy, Grybauskaite told the German Press Agency dpa that tackling Lithuania's economic crisis and rooting out the vested interests of oligarchs would feature prominently.

She predicted her presidency, which begins in July, would be "an addition" to the policies of her predecessor, Valdas Adamkus, rather than something completely different.

Adamkus had phoned Grybauskaite earlier to congratulate her. "I am greatly delighted that the people of Lithuania demonstrated strong political will and elected the new president of Lithuania in the first round," Adamkus said in a statement.

Preliminary results gave Grybauskaite just over 68 per cent of the vote on turnout of 51 per cent, with second-placed Algirdas Butkevicius trailing on 12 per cent.