Ben Affleck has praised "spectacular" Jennifer Lopez

Asked about the film's early positive reviews, Ben compared it to his other current project, the Cillian Murphy-starring 'Small Things Like These', and told 'Entertainment Tonight': "'Unstoppable' is a very different movie than this but in a way it's similarly rooted in the passion of really talented artists.

"[Director] Billy Goldenberg and Jennifer [Lopez] and Don Cheadle and Jharrel [Jerome], and Bobby Cannavale, all were really passionate about this film...

"Jennifer is spectacular.

"['Unstoppable' is] another one that we're really really proud of. We believed in the right people [in 'Small Things Like These'] and 'Unstoppable' is another example of that."

Last month, the 'Hustlers' actress admitted ending her marriage to Ben almost took her out "for good" but she doesn't regret her decision.

Jennifer - who was previously married to Ojani Noa, Cris Judd, and Marc Anthony - told Nikki Glaser in a conversation for Interview magazine: "I was thinking about this time in my life, and I'm like, 'That's not what I thought it was going to turn out like.' And then I thought, 'No, this is exactly where I needed to be, to lead me to where I want to go.'"

Asked if she doesn't regret the pain she went through, she added: "Not one second. That doesn't mean it didn't almost take me out for good. It almost did.

"But now, on the other side of it, I think to myself, 'F***, that is exactly what I needed. Thank you, god. I'm sorry it took me so long. I'm sorry that you had to do this to me so many times. I should have learned it two or three times ago. I get it. You had to hit me really hard over the head with a f****** sledgehammer. You dropped the house on me. Don't have to do it again.' "

The 'On the Floor' hitmaker - who didn't mention Ben by name throughout the interview - admitted it has been "f****** hard" being along and there are times she has felt "sad" and "desperate" but she knows she will be fine on her own.