The three, who have all enjoyed long-running roles in top soap operas EastEnders or Coronation Street, were targeted on behalf of journalists working for Trinity Mirror.
Bosses of the company have agreed compensation payments to the trio, as well as Bbc executive Alan Yentob, and issued an apology for the phone hacking.
In a statement, a representative for Trinity Mirror - which publishes the Daily Mirror, Sunday Mirror and The People - says, "The company today confirms that its subsidiary Mgn Ltd has admitted liability to four individuals who had sued Mgn for alleged interception of their voicemails many years ago.
"Mgn has apologised to those individuals and agreed to pay compensation. The amount of that compensation will be assessed by the court if it cannot be agreed."
The probe into Trinity Mirror follows a long-running police inquiry into the activities of journalists at Rupert Murdoch's News Uk, publishers of disgraced tabloid the News of the World, which was closed in 2011 amid claims a private investigator hacked thousands of famous people's voicemails on behalf of the newspaper.