Michelle, who is six months pregnant with her second child, joined Liz and fellow Big Reunion stars, 911's Jimmy Constable and Lee Brennan, to celebrate 25 years of ITV daytime show, This Morning.
Michelle, 34, who announced earlier this month that she was expecting a baby boy with husband Hugh Hanley, shared her excitement about the party on Twitter.
She said: "Very much looking forward to @itvthismorning party tonight! Girls night out with @LizMcClarnon (and a boy bump tagging along too) lol xxx."
It proved to be a fun night and the stars got straight into the party spirit by trying on props for a series of photo booth snaps!
Michelle, who shared some of the photos with fans on Twitter, said: "Fabulous night at @itvthismorning 25th anniversary party. Thank u for having us xx."
In one photo, Michelle dons a red curly wig, Lee rocks a pair of pink oversized heart-shaped glasses, while Liz poses with pink decorations on her head!
Taking to Twitter, Jimmy said: "Happy 25 years to @thismorningitv. Great seeing you all and the mad Big Reunion bunch."
Commenting on the group photo posted by Michelle, Jimmy added: "Night out with the family."
The Big Reunion stars have been busy recording a Christmas charity single, but will also be heading back on the road next month for the Big Reunion Christmas party tour.
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