Chris Pratt's son thinks he's a firefighter.

Chris Pratt

Chris Pratt

The 'Guardians of the Galaxy' star has revealed he hasn't been totally honest with his two-year-old son Jack - who he has with wife Anna Faris - about what his job is.

He said: "[He] loves everything trucks, cars and automobiles.

"I know [he thinks I'm a firefighter] because I'll say 'Hey bud, I'm gonna be back tomorrow. I gotta go to work'. And he'll go, 'Um, are you going to work on your fire truck?' And I'm like 'Yes, I am, son.'"

Whilst making an appearance on 'The Tonight Show with Jimmy Fallon', the 35-year-old actor also admitted to pranking customers whilst working in a fast-food restaurant as a young boy.

He shared: "I would operate the drive-through. I'd take people's orders.

"People would get out of their car and go into the minimart [across the road] and I would be hidden in the Viking Drive-In over the intercom and I would mess with them. I would be like 'Hey, buddy, I need your help.'"

And there is a possibility Chris may become a firefighter after he previously joked that he found acting "embarrassing".

He said: "The role [in 'Guardians of the Galaxy] was difficult because you are always taking the big swing and sometimes you don't know if it's working.

"I mean, acting is already embarrassing. But I just went for it and trusted the director."