The oath of office taken, President Barack Obama and his wife Michelle, set out on triumphant drive down Pennsylvania Avenue.
The first couple sent the crowd wild as they stepped out and walked part of the way waving to the tens of thousands who lined the route.
The new first family then watched the inaugural parade.
Then it was back to the White House for a quick change and on to 10 inaugural balls around the state capital.
After a night of celebration the serious business of running the country starts with President Obama meeting senior economic advisers and military commanders on his first day in the Oval Office.