Kennedy, 32, is the grandson of former Sen. Robert F. Kennedy (D-N.Y.) and the son of former Rep. Joe Kennedy II (D-Mass.).
The couple, who met at Harvard Law School, had been dating for five years and had been engaged since January.
Love appears to be in the air among the Kennedy clan. Joe Kennedy’s twin brother, Matthew, tied the knot with Katherine Lee Manning, director of public affairs at The Glover Park Group, in Hyannis Port over the summer.