The Hollywood actress, who has two sons with the actor, married Brian in 2010 - but apparently just five years later their union is officially over.
According to a source, who spoke to USmagazine.com, Megan has been separated form Brian for six months, despite sharing Noah, 2, and Bodhi, 18 months, with her husband.
The Transformers star and her Terminator actor husband have been together for over a decade - with Megan being just a teen when they got together.
And apparently the split is all down to Megan’s continued absence as she made consecutive films, with this summer seeing her take a role in the Teenage Mutant Ninja Turtles joie.
‘They fight about her career’ said a source.
But while Brian, 42, wanted his 29-year-old wife to spend more time at home with their family, it seems Megan was ‘obsessed’ with getting more roles.
Brian and Megan met when he guest starred on the sitcom Hope & Faith, on which Megan had a starring role.
Neither Megan nor Brian have yet confirmed the reports.