US President Barack Obama will attend a summit with European Union leaders in Lisbon in November, the White House and European Commission have announced.
Mr Obama has been accused in the past of ignoring Europe, and upset some by skipping the annual US-EU summit in May.
But the White House said the president was looking forward to November's meeting.
The US "has no stronger partner than Europe in advancing security and prosperity around the world", it said.
A European Union statement said: "The transatlantic relationship is vital to global prosperity, and both sides are committed to co-operate in order to promote growth and jobs in their economies."
In Portugal, Mr Obama will meet European Council President Herman Van Rompuy, the President of the European Commission, Jose Manuel Barroso, and other EU leaders.
The meeting will take place on the sidelines of a Nato leaders' gathering on 20 November.