BOSTON - Maura Healey was sworn in as the 73rd governor of Massachusetts Thursday.

Healey, a Democrat and the former attorney general, is the first woman to be elected governor in the state and is one of the first openly lesbian governors in the country. Lt. Gov. Kim Driscoll, the former mayor of Salem, took her oath of office as well.

The new administration celebrated with supporters before getting to work on their agenda, one that includes making the state more affordable, more competitive and more green. Healey laid out some of her goals in her inaugural address.

"We want people to come here," Healey said. "And we want people who grew up here to stay here. Our country looks on Massachusetts as a gleaming example of liberty and equality and success. But too many states are beginning to pass us by. We have to make Massachusetts a place that people can afford to call home. Our people can't realize their dreams until we end the nightmare of high costs."

Healey said she'll file legislation to create a secretary of housing and will work to turn unused state properties into rental housing or homes. She also highlighted commitments to tax reform and job training efforts.

Many local state leaders were at the state house Thursday for the inauguration ceremony. State Rep. Jim O'Day (D-West Boylston) called it a history making day.

"Having a team of two women here today is a new level of excitement for the state house and for the commonwealth," O'Day said. "And we're all very excited and looking forward to the next four years."

O'Day and many of his colleagues cheered as Healey outlined issues she wants to address, like fixing the MBTA, free community college for students older than 25 and meeting climate goals.