The actress took to Instagram to share the sweet snap of herself carrying her youngest son, one-year-old Journey River, and look-alike mum Gloria.
"Clone wars," she captioned the image.
Fox, 31, welcomed son Journey with husband Brian Austin Green, 44, in August 2016.
The couple are also parents to 3-year-old Bodhi and 5-year-old Noah as well as Kassius, 14, Green’s son from a previous relationship.