The 42-year-old SPLASH! star plays a wannabe mum in the John Sayles film, which follows the trials and tribulations of a group of Americans who go to Mexico looking to adopt children.
And Hannah admits the storyline, coupled with the experience of meeting the poor children who would hang around the set, made her start thinking about becoming a first-time mum.
She says, "It's something I've always wanted and it's something I still want, but conditions and circumstances haven't been right.
"I think once you get to the point where you want a child, you should do whatever needs to be done to make that happen. That's what this film is about. I understand that.
"It killed me to be on that set and see the conditions kids lived in there. I'm terrible because I have like a billion stray animals at home and that's what these homeless kids were like for me.
"I can't stand to see homeless kids running around the streets. I just wish I could take everyone home and help them out."25/08/2003 10:41
The mystery woman will be receiving some ‘freshly picked flowers’ from the Irish actor this Valentines Day.
James Corden’s Carpool Karaoke is becoming quite popular and celebrities appear...