The couple confirmed the news in a statement on Monday: "Lucy-Jo Hudson and Alan Halsall are sad to announce that they have separated. They have shared many wonderful years together and will remain close friends. They ask for privacy at this emotional time, to allow both to focus on their beautiful daughter Sienna-Rae, to ensure her continued happiness."
Alan, who plays mechanic Tyrone Dobbs, married Lucy-Jo, who played Katy Harris from 2002-2005, in 2009 and had a daughter, Sienna-Rae, in 2013.
Coronation Street fans will be surprised at the announcement. The couple appeared to be one of the happiest in soapland.
Last year the couple were talking about expanding their family further.
"A psychic has told me I’m going to have twins," said Lucy-Jo. "We have twins in both our families."
Alan revealed his priorities had changed after they became parents: "I miss my little girl, Sienna-Rae, when I'm at work so, as soon as I finish a scene, I'm in the car as quick as I can because I want to be part of everything.
Only last month Alan retweeted his wife after she revealed her excitement about working on Doctors.
It read: "Loving working on BBCDoctors for the next few months. Great "dark" storyline. So good to be back at work x"
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Patrick McLennan is a London-based journalist and documentary maker who has worked as a writer, sub-editor, digital editor and TV producer in the UK and New Zealand. His CV includes spells as a news producer at the BBC and TVNZ, as well as web editor for Time Inc UK. He has produced TV news and entertainment features on personalities as diverse as Nick Cave, Tom Hardy, Clive James, Jodie Marsh and Kevin Bacon and he co-produced and directed The Ponds, which has screened in UK cinemas, BBC Four and is currently available on Netflix.
An entertainment writer with a diverse taste in TV and film, he lists Seinfeld, The Sopranos, The Chase, The Thick of It and Detectorists among his favourite shows, but steers well clear of most sci-fi.