The 29 year old, who plays David Platt on Coronation Street, has been dating the mum of two since they were both 14.
However, according to reports, the couple have called time on their relationship.
An insider reportedly told The Sun they told close pals they are “over”.
“They have been through a lot but are still young enough to sort themselves out for the future,” the source claimed.
And a spokesman for the actor told the publication: “Jack and Lauren remain the best of friends and their main focus is the care of their children.”
Jack and Lauren, who share children Nyla and Reuben, started dating when they were 14.
Charlotte Crosby and Stephen Bear have split again after Charlotte took to Twitter to reveal he’s already moved on [PA]
The pair hit a rough patch back in 2011, after a DNA test revealed he was the father of a baby boy, following a one-night-stand.
However, the brunette beauty forgave him and they later announced their engagement.
Jack’s son with model Sammy Milewski suffers from Alternating Hemiplegia of Childhood (AHC) – which causes sudden, painful and random paralysis of a portion of the body.
And his mum recently revealed heartbreaking news about the tot, following a recent health scare.
Writing to her 617 Twitter followers, she wrote: “My lil ones condition is too strange Last 2days he’s not been able t move an talk, now he’s just told me he wants t be a rocksingin & dancing.”
She then praised little Greyson’s bravery, saying that he’s doing much better following the random attack.
“From being soo poorly to just get up an say he’s better an star dancing. Couldn’t be prouder of him,” she gushed.
OK! Online has contacted Jack’s reps for a comment.