The Dark Knight Rises star looked almost unrecognisable with a shorter hairstyle, glasses and a grey cardigan, while pushing her daughter Ramona in a buggy and holding her baby Gloria Ray in a sling.
And it appears that the Secretary actress is happy to keep it that way, smiling to herself as she made her way undisturbed through the Irish capital.
Maggie is in Dublin for a three-week stint of filming. She is working alongside Michael Fassbender and Domhnall Gleeson in director Lenny Abrahamson's new film Frank. The €5m feature began shooting in New Mexico and will continue in Ireland until February 15.
Gyllenhaal's husband, actor Peter Sarsgaard, was not with her.
It's believed Gyllenhaal may attend next month's IFTAs, as her colleagues have been nominated for two awards.