The stars of Strictly Come Dancing were targeted by thieves during Saturday night's show at Blackpool's Tower Ballroom.
An iPad, mobile phone and jewellery were among items stolen from a Strictly dressing room shared by female contestants and dancers.
A Lancashire Police spokeswoman said: “We are investigating a theft that has occurred at the Tower Ballroom at Blackpool. It was reported to us at around 21.45 GMT that some items had been taken from a dressing room within the building - officers are investigating the theft and are making a number of enquiries to trace the person or people responsible.”
It remains unclear how the thieves gained access to the room, but it is thought they may have used the glitzy venue’s 120-year-old “rabbit warren” tunnel system to escape, avoiding CCTV cameras.
The underground pathways were originally built to ease the movement of circus animals, theatre equipment and actors between performance buildings in the seaside resort.
Police declined to reveal who the items belonged to, but model Abbey Clancy has since spoken of her upset over losing her mobile, which had family photos stored on it.
Former Bond girl Fiona Fullerton was voted off the show last night, leaving eight remaining celebrity contestants still dancing.
Among those left standing are pop star Sophie Ellis-Bextor, actors Patrick Robinson and Mark Benton, Hollyoaks’ Ashley Taylor-Dawson and BBC Breakfast presenter Susanna Reid.