Colchester have signed Crystal Palace full-back Danny Granville and Arsenal youngster Matthew Connolly.
Danny Granville began his career with Cambridge United.
Granville, 32, has joined on a free transfer and replaces left-back Chris Barker, who was on loan at Layer Road last season but has since joined QPR.
Centre-half Connolly, 19, spent three months at Bournemouth last term and arrives on a season-long loan.
Meanwhile Colchester captain Karl Duguid has stated that he does not want to leave the club.