Kym Marsh and Jamie Lomas have broken up after 15 months together.
According to a spokeswoman for the ITV1 soap, no one else was involved in the break-up.
The couple were said to be devastated when their baby son, Archie Jay, who was 18 weeks premature, died moments after he was born in February.
Kym, who plays Michelle Connor in Coronation Street, was married to former EastEnders star Jack Ryder and has two children, Emily and David, from a previous relationship with Dave Cunliffe.
In a brief statement, Coronation Street producers said: “Coronation Street actress Kym Marsh has announced that she and former Hollyoaks actor Jamie Lomas have split up after 15 months together.
“Jamie has moved out of Kym’s house in Cheshire. There is no one else involved and neither party wish to comment at this time.”