Hit musical The King and I was brought to a halt at Manchester's Palace Theatre on Thurday night, when staff attended to what is described as "a first aid incident".
Cast members were ushered off stage while an announcement was made to the audience that the show would be briefly halted.
A member of the audience told the MEN that the show's star Darren Lee, who is playing the King of Siam in the Rodgers and Hammerstein classic, was on stage at the time. Staff ushered the cast off stage while first aiders assisted an audience member who had taken ill.