Mark Wahlberg showed an audience at the Toronto International Film Festival the first trailer for “Patriots Day,’’ director Peter Berg’s movie about the Boston Marathon bombings. The movie is due out at the end of the year.

The trailer wasn’t long and didn’t reveal much, but we did glimpse shots of Fenway Park and the Marathon finish line, and got a brief look at the law enforcement characters played by J.K. Simmons, John Goodman, and Kevin Bacon. Most of the trailer featured Wahlberg’s character — a Boston cop — kissing his wife, played by Michelle Monaghan, and then heading out the door in a yellow vest to work the race.

Wahlberg shared the exclusive first look during the festival’s “In Conversation With Mark Wahlberg’’ event, an “Inside the Actors Studio’’-style look at his long career as an actor and producer. Wahlberg told the audience he had mixed feelings about signing on for “Patriots Day’’ because he understood that people around Boston were conflicted about the project. In the end, he said, he didn’t want the story in the wrong hands and it wasn’t too soon for the movie to be made.

“It’s not soon enough,’’ he said. “This stuff is happening all around us.’’

Of the finished product, Wahlberg said: “It’s such a special movie. I can’t wait for people to see it.’’

The actor spent much of the conversation talking about prior films, including his big break, “Renaissance Man,’’ directed by Penny Marshall. He said we can thank Marshall for convincing him to pursue an acting career instead of focusing on his music. In the early 1990s, he had no interest in acting, but she helped him figure out his calling.

“She said, ‘You act like a rapper, but you are an actor,’ ’’ he said.

Wahlberg also credited his dad for helping shape his career by taking him to see movies. The first was “Hard Times’’ with James Coburn.

“My dad would sneak in a six-pack of Schlitz,’’ Wahlberg said.

There was some commotion during Wahlberg’s event; after only a few questions, someone in the audience had to be kicked out by security. As staff members rushed to remove the person in question, Wahlberg joked, “I hope he’s not with me,’’ and then asked if the guy was from the Funky Bunch.

Wahlberg was also in Toronto to promote Berg’s “Deepwater Horizon,’’ which was scheduled to premiere Tuesday night. The actor said his next project is a film that will have him in England with Anthony Hopkins on Thursday. It’s the next installment of the “Transformers’’ franchise, directed by Michael Bay.