The former Coronation Street star will appear as a panellist on the next series of the ITV1 show. Lindsay and Carol Vorderman have both joined the programme, after bosses axed Kate Thornton and Zoe Tyler.
However, the 38-year-old, who gave birth to twin boys Victor and Louie last September, said that she will not be able to join her new colleagues on their infamous nights out.
"Oh, God! I've got to be up at 5am, so if it's an early finish I don't mind drinking, but not a big one like them," she told The Mirror. "I couldn't keep up."
The actress added: "I'm ready to be a Loose Woman. I can't wait, it's going to be a right laugh."
Current stars including Carol McGiffin, Andrea McLean and Denise Welch are apparently "threatening a mutiny" over the decision to axe their colleagues.
> Zoe Tyler 'shocked' over 'Loose Women' axe
> ITV defends 'Loose Women' ratings performance