President Barack Obama taped the second part of an interview with CNN celebrity chef Anthony Bourdain before leaving the Vietnamese capital for his next stop: Ho Chi Minh city.
Bourdain's Part Unknown food travelogue is one of the network's most popular non-fiction series.
Obama and Bourdain met in a small complex in Hanoi's Me Tri neighbourhood in a heavy downpour.
The two met over a restaurant dinner to discuss Obama's trip to Asia and his interest in the people, food and culture of Vietnam, CNN said.
CNN has aired Bourdain's show since 2013. He travels to a different part of the world for each episode to explore that area's culture, primarily by sharing in the area's distinct native cuisine.