However, the cause of death or link to the episode are now unknown.
The Jeremy Kyle Show has been taken off air in the United Kingdom after a guest died shortly after recording.
The episode featuring the participant who died will be submitted for a review due to the "seriousness of this event", ITV said.
More information to follow.
The show was recorded on May 2 but Ms Callaghan revealed she last saw him four days before he was found dead last week.
The Jeremy Kyle show has been cancelled "indefinitely" following the death of a guest on the show.
Ms Callaghan told the newspaper: "We got engaged Christmas Day 2017".
The unnamed participant died a week after appearing on an episode of the show which ITV has said it will not be airing.
The Jeremy Kyle Show's official YouTube account still has clips from the programme available to watch.
The former "EastEnders" actress and "X Factor" star were due to appear on tomorrow's (14.05.19) episode, but Chris has confirmed it will air "at a later date".
Cadwalladr shared a piece she wrote in 2008 about the programme and said she was "amazed it took this long" for the show to have such grave effects on its subjects.
The programme has had its regular daytime morning slot on ITV since 2005.