The MBTA's first new rapid-transit station in 27 years is set to open Tuesday at Somerville's Assembly Square.

(Abby Elizabeth Conway/WBUR)

Orange Line trains will begin stopping at the new Assembly station, between Wellington Circle and Sullivan Square, with the start of service Tuesday morning, according to a T spokesperson.

A 10-minute ride from downtown Boston, the station is the capstone of Somerville’s massive $1.5 billion Assembly Row development. Though not completed, it's already home to dozens of retail outlets and restaurants, two new apartment complexes, a Legoland Discovery Center and a 12-screen movie theater.

"This new Orange Line station will provide a vital, accessible and convenient rapid transit link for the City of Somerville, especially the new Assembly Row neighborhood," Transportation Secretary Richard Davey said in a statement.

While the station will open to passengers Tuesday, construction is expected to continue through November.

It's the first Orange Line station for Somerville, and one of six new T stops slated to open there in the next decade.