Former X Factor judge Sharon will make a return appearance as a guest co-host, while Judy, Penny and Gloria will be regular panelists.
"The last time I was a 'Loose Woman' earlier this year I had such a ball with the other panelists and the audience that I cant wait to do it again," said Sharon. "It's refreshing to be able to talk about real issues with other women while having a great laugh at the same time."
She continued: "I'm still heavily involved with my US show The Talk but when I'm back in the UK I'm looking forward to opening up on issues the American's would rather not discuss at lunchtime."
The stars will be debating a broad mix of topics from the lighthearted to the more serious alongside the Loose Women presenting team, Andrea McLean, Ruth Langsford, Coleen Nolan and Janet Street Porter.
Former This Morning presenter Judy, who is returning to TV without her husband Richard Madeley, said: "I know I said I wouldn't go back on the telly, but actually I'm looking forward to occasionally contributing to lively conversations between a group of outspoken and intelligent women."
Loose Women returns with a new look set for the 19th series of the lunchtime show.
Martin Frizell, editor of Loose Women added: "I'm delighted we have been able to confirm more of Britain's best loved, successful, assertive and, let's face it, downright smart women to join our Loose Women team."
The new series of Loose Women kicks off on Monday 8 September at 12.30pm on ITV.
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