Martin Freeman Defends Huge Age Gap With Onscreen Lover Jenna Ortega

Martin Freeman isn't apologizing for the huge age gap between himself and onscreen love interest Jenna Ortega ... even though the internet collectively found it pretty gross. Martin and Jenna's recent flick, "Miller's Girl," faced backlash after it was revealed their characters would be romantically involved with one another. Fans cited the actors' ages as an issue ... since there is a 31-year difference between…