WASHINGTON — New Jersey's newest U.S. Senator is preparing to be sworn in.

The ceremony for Jeffrey Chiesa is scheduled for 4:30 p.m. in Washington.

He'll be the first Republican U.S. senator from New Jersey since another fill-in in 1982.

Gov. Chris Christie appointed his state attorney general to the seat last week after Sen. Frank Lautenberg died at 89.

Chiesa will not run in a special election in October to complete the term, which expires in January 2015.