When Coronation Street's newest family arrive on the cobbles later this year, there will be one sibling viewers won't actually get to meet right away.

The ITV soap is introducing Edison (Trevor Michael Georges) and Aggie Bailey (Lorna Laidlaw) along with their sons Michael (Ryan Russell) and James (Nathan Graham) when they buy No. 3 from Norris Cole (Malcolm Hebden).

There's also a Bailey sister named Diana – but Coronation Street producer Iain MacLeod revealed to Digital Spy and other media on Friday (April 5) that her arrival will be saved for later in the year.

"They've got a sister as well – in age terms she is half-way between James (19) and Michael (27)," MacLeod said. "We don't meet her quite yet – she's called Diana or Dee Dee.

"Her birth will have roughly coincided with the death of Princess Diana so she's called Diane or Dee Dee or Princess by the brothers because she's whatever the female equivalent of a Golden Balls is. Aggie will come off the phone and say she can't make it for Easter because she has a conference in Chicago. She's over there somewhere."

The producer went on: "We've not cast her yet — she will be an off-screen presence a bit like Brenda from Streetcars – and will be a source of comedy friction around the dinner table.

"It'll be like, 'Awww on WhatsApp, your sister has just sent a picture of her new convertible!' So, hopefully there'll be some anticipation of the kind of character she is before she arrives."

Good luck shipping that convertible from Chicago to Weatherfield, Diana!

Digital Spy