Mark Wahlberg finds it "extremely difficult" to talk about the Boston marathon bombings.

Mark Wahlberg

Mark Wahlberg

The 45-year-old Boston native stars as Sergeant Tommy Saunders in 'Patriots Day', the drama based on the events of the 2013 terrorist attack - which resulted in six deaths and left approximately 280 people with non-fatal injuries - and says whilst he felt a sense of "pride" being involved in the project, it's also made the event "more and more difficult" to deal with.

Speaking at a special screening for the movie, Mark said: "It's such a small community, so everyone knew someone who was affected.

"I also felt a sense of pride being there. It was extremely difficult making [the] movie... it's becoming more and more difficult to talk about it."

Meanwhile Kevin Bacon - who also stars in the movie as an FBI Special Agent named Richard DesLauriers - said it was important "not to live in fear" of the terrorist attacks, as he believes if you are scared, "they won".

He added at the screening: "You have to choose whatever feels right to you and your family... but what I choose is to not live in fear. Because if you live in fear, they won."

Previously, Mark said he felt an immense amount of "pressure" to get the movie right, due to it's sensitive nature.

He said: "We felt like it was very important to do this, but do it right.

"And of course, me being from Boston, and knowing that I would be held accountable personally, it was a lot of pressure, certainly more pressure than I've ever felt.

"Everybody knows somebody who was directly affected by this.

"It's such a small community. So, yeah, I felt an enormous amount of pressure, but I knew, based on my work experience with Pete [Berg, the director], that he was the right guy for the job because of how much he cares."