Joseph Kennedy III has moved to Brookline ahead of an expected congressional bid to replace retiring U.S. Rep. Barney Frank.
Kennedy had been living in Cambridge, which is in a different district.
Brookline’s town clerk says the 31-year-old Kennedy came to town hall Tuesday and registered to vote as a Democrat, listing a Brookline address.
Kennedy is the son of former U.S. Rep. Joseph Kennedy II and a grandson of the late Robert F. Kennedy. The family has deep ties to the Boston suburb.