"As a father, as a man who almost lost a son in a terrible accident one night in Malibu, that's what drew me to it," said actor Pierce Brosnan. "You know, it's a raw, honest -- I hope -- portrayal from all the actors of this family that's struggling with grief."
"The Greatest," which also features Susan Sarandon, was actually made two years ago before Mulligan's Oscar nomination for "An Education," and before Pierce Brosnan's other three films so far this year.
All their recent attention may have helped "The Greatest" make its way into theaters.
"I hope it has. I hope our collective red carpet appearances have made a difference," said Mulligan. "I mean, that's why you do awards ceremonies and red carpets and premieres. You want to promote the work that you're proud of and we're proud of this."
Brosnan plays a math professor in this movie. Mulligan had to play pregnant, fake belly and all.
"I didn't keep the belly," said Mulligan. "It was such a nightmare."
"The Greatest" is rated R. It's tough, but it tells a very compelling story with good performances from all the film's major players.