In a press release, Grybauskaitė spoke of the importance of the award to the people of Lithuania who peacefuly fought for independence.
"The award also carries extreme importance to the people of Lithuania, who gained independence and defended freedom in a peaceful way. The Nobel Prize for peace awards ceremony will be attended by President Dalia Grybauskaitė representing Lithuania," the president's press service told BNS in response to an inquiry.
Grybauskaitė will be among 18 EU leaders who have accepted the invitation to appear in the event to be held in the Norwegian capital on 10 December. Among the participants are German Chancellor Angela Merkel and French President Francois Hollande.
Meanwhile, six leaders, including British Prime Minister David Cameron and Euro-skeptical Czech President Vaclav Klaus, announced their intention to skip the trip to Norway.
The EU currently consists of 27 countries.
In October, the Nobel Committee announced that the EU would be awarded the prize for its role in preserving lasting peace in the continent divided by World War Two. The committee's decision drew both applause and criticism.
The prize will be accepted by EU's three highest-ranking officials: European Union Council President Herman Van Rompuy, European Commission President Jose Manuel Barroso, and European Parliament President Martin Schulz.