Tom Cruise discusses his career plans with his four-year-old daughter.

The actor - who is married to Katie Holmes - describes the story contained in his scripts to Suri and then listens to her questions because he thinks it makes him a better actor.

He said: "I'll put Suri on a swing and tell her stories when I'm working on a script.

"I'll start with the beginning of the movie and take her through the story beat by beat. Of course, I make it age-appropriate. She's four years old. But she asks all the right questions, 'Why does that happen?' 'Those are the bad guys?' 'You're the good guy, right?'

"It comes down to the same thing as when I was a kid. Can I create a character that will make her happy, that will make her laugh? And you know what? She makes me get better and better, because she's always asking me to do it again."

Tom - who also has adopted children Connor,15, and 17-year-old Isabella with ex-wife Nicole Kidman - constantly tries to be the best parent he can because of a promise he made his eldest child when she was just a baby.

He added in an interview with America's Esquire magazine: "I'll never forget the moment I became a dad. But it's hard to describe - that level of responsibility, the desire to give such joy. The clarity: nothing is more important than this.

"I remember that first night, just staring at Bella. I was checking her every second, just looking at her, feeling that immediate bond. I was probably looking at her so much that I was keeping her up.

"I made a promise to her - all I can do is the best I can. But I'm not going to say I'm gonna do something and then not do it."