According to a press release from the president's office, Grybauskaite underlined Lithuania and Poland as being among the most active supporters of Ukraine.
"We have a common understanding of the geopolitical situation and threats to our region," Grybauskaite was quoted as saying in the press release.
"The closer our cooperation is at all levels, the more secure and stable our region will be," the president said.
In her words, Lithuanian and Poland are always ready to help Ukraine in its European integration efforts.
"It is important for Ukraine to carry on with reforms and meet recommendations of the European Commission for a visa-free regime with the EU," said the press release.
Bogdan Borusewicz, Marshal of the Polish Senate, Volodymyr Groysman, Chairman of Ukraine's Verkhovna Rada, and Loreta Grauziniene, Speaker of the Lithuanian Seimas (parliament), met with Grybauskaite while participating in the sixth Interparliamentary Assembly of Lithuania, Poland and Ukraine.
The advisory institution was established in 2005 in Lutsk, northwestern Ukraine. The sixth assembly was closed with a declaration highlighting support to Ukraine's independency, and European integration, noting positive developments in Ukraine's systemic reforms.
The assembly also called the EU national parliaments for a swift ratification of the EU-Ukraine association agreement.
The trilateral institution expressed their willingness to cooperate in seeking a visa-free regime for Ukraine in 2016.
"The Assembly looks forward to a positive report by the European Commission suggesting exempting Ukrainian citizens from the visa requirement in order to provide for visa-free travel in 2016," the declaration said.
During the meeting with the speakers, Grybauskaite mentioned the recently established Lithuanian-Polish-Ukrainian military brigade LitPolUkrBrig as one of the examples of successful trilateral collaboration.
"The brigade will strengthen the strategic partnership and military cooperation among the three countries," said the president's office.
Meanwhile, the assembly noted in its declaration the importance of the brigade "for Ukraine's effort to meet NATO standards."