By Matt Viser Globe Staff

WASHINGTON – President Obama was sworn into office on Sunday just before noon, officially beginning another four-year term.

“I did it,” Obama said to his youngest daughter, Sasha, after being sworn in by Supreme Court Chief Justice John Roberts. He thanked the small group gathered in the room, and then left with his wife and two daughters.

With his left hand on a bible that belonged to First Lady Michelle Obama’s grandmother, Obama took the oath inside the White House’s Blue Room – named after the upholstery, carpet and drapes that hang on windows that overlook the South Lawn and the Washington Monument.

Obama was sworn in several hours after Vice President Joe Biden took his oath at 8:21 a.m. at his official residence at the Naval Observatory. The early hour for his ceremony was because Supreme Court Justice Sonia Sotomayor -- who was the first Latina and third woman to administer the oath for a vice president -- had to catch a train to New York for a book signing. She will return in time for Monday’s Capitol ceremony.

Biden’s service was attended by his family, top administration officials, and several longtime aides. In a potential sign of Biden’s further political ambitions, there were also several Democrats from early primary states, including newly elected New Hampshire Governor Maggie Hassan and South Carolina Democratic Party chair Dick Harpootlian.

“Let’s just say I see a number of superdelegates here,” Donna Brazile, a top Democratic consultant, told a pool reporter who witnessed the event on behalf of the media.

Biden, 70, is the second-oldest man to be sworn in as vice president (exceeded only by Alben Barkley, who was a year older when he began his term in 1949 as Harry Truman’s vice president). If he ran and won, Biden in 2017 would be the oldest president to be sworn in as his first term as president.