Tara, 42, has had a well-documented struggle with drug addiction, and candidly talks about some of her darkest moments as part of a week of celebrity specials with Jeremy.
She also reveals that she has seen a therapist every week day for the past nine years.
The other stars sitting down with the chat show host this week are Michael Barrymore, who will talk about this own addictions and the death of Stuart Lubbock at his home in 2001, Tito Jackson, Coronation Street's Liz Dawn and Sean Ryder of the Happy Mondays.
In an exclusive interview with HELLO! back in October, Tara said that a year of sobriety had helped her "declutter" her life.
The socialite revealed that she had given up alcoholic drinks after realising that she needed to "put my brain in order and get my life back on track". That prompted her decision to check into rehab in late 2012.
"To be able to go somewhere and feel completely safe, knowing there's no one hiding up a tree trying to get a photograph of you, or waiting to tail you in a car, I felt really at peace," she told HELLO!.
"When I came out, I felt healthier, happier, I'd gained weight – it was during that time in rehab that I thought, 'I really want to change my life, I don't want to live in the chaos any more'."