'Half-Blood Prince' opens in Boston

From Left: Sarah Smith (Luna Lovegood), 13, Jamie Lynn Smith (Professor McGonagle), 21, Peter Skipper (Dumbledore), 18, Stephen McGovern (Neville Longbottom), 18, all of Dorchester.
From Left: Sarah Smith (Luna Lovegood), 13, Jamie Lynn Smith (Professor McGonagle), 21, Peter Skipper (Dumbledore), 18, Stephen McGovern (Neville Longbottom), 18, all of Dorchester.
Taylor Adams/Globe Correspondent