Coronation Street stars have been banned from changing their hairstyle in the run-up to the soap's live episode. The milestone event focuses on the aftermath of the tram crash disaster, and picks up where the cast left off filming two months ago.
Graeme Hawley, who plays hapless John Stape, told the Mirror: "We've not been allowed to cut our hair, lose weight or put on weight.
"The morning of the live episode they are going to get pictures of how we looked when the tram crashed in order to get our hair exactly the same."
Sixty-five members of the cast will be involved in the hour-long transmission, which comes 10 years after the soap's last live broadcast.
Graeme, whose character was seen clobbering barmy Charlotte Hoyle (Becky Hindley) with a hammer on Monday, has one of the busiest roles in the episode, and has to whizz between sets.
He said: "I've got to sprint so fast from scene to scene that I've been asked to beef up my shoes with special grips because I'm worried about slipping over.
"In one scene I'm in the alley and then exactly one minute and 40 seconds later I'm due inside the Stapes' house. They are filmed on two completely different sets."
He added: "The worst thing is that on screen it only looks like I've done a six-foot walk so I'm not supposed to be out of breath - I've no idea how I'm going to cover that up."