Warning major spoiler :) The film was based on the account of Martin Sixsmith’s book ‘The Lost Child of Philomena Lee’. Martin in the movie was played by Steve Coogan. In the movie, he was a journalist who was fired from work because of a scandal he has nothing to do about. He was contemplating on his next career move to try to write Russian History but it has changed dramatically when he met a waitress at a party who asked him to do a human interest story about her mom who was painstakingly trying to find her lost child for 50 years.
Martin: "Don't upset yourself."
Philomena: "What if he was obese?"
Philomena: "I watched this documentary that says a lot of Americans are huge. What if that happened to him?"
Martin: "What on earth makes you think he'd be obese?"
Philomena: "Because of the size of the portions!"