Heavily pregnant Amanda Holden pulled out of Britain's Got Talent auditions on Tuesday.
According to her spokesperson, the star is currently under observation in hospital. She is thought to be showing signs of labour.
Amanda had been due to join Simon Cowell, Alesha Dixon and David Walliams for the second day of the Britain's Got Talent auditions.
A spokesperson for the show said the auditions will go on with the three remaining judges.
Despite the tragic loss of a baby in her third trimester last year, Amanda has appeared happy and healthy throughout this current pregnancy.
She was recently pictured out and about in a mini dress and heels.
Responding to remarks about her outfit, she tweeted: "I walk less than 25metres a day in heels whilst up the duff! #justsaying!"