Russell Crowe's eldest son loves to pick holes in the movies he watches - including his dad's iconic movie Gladiator.
The actor, who is currently starring in The Nice Guys, is father to 12-year-old Charles and nine-year-old Tennyson.
It was only recently that the kids saw Russell's role as Maximus in the epic Ridley Scott movie from 2000.
The 52-year-old said: "My kids wanted to see it at Christmas for the first time. My youngest one loved it, my oldest one talked all the way through it. I didn't sit and watch it with them but the people who did told me afterwards.
"I think because my eldest has explored that film so deeply on the internet, he feels he has a sort of connection with it so he was looking for all the mistakes that are listed on the internet rather than actually watch the movie.
"My eldest one yes is very critical in that regard, not just of my work but of anything. He's a real sponge and a big reader and stuff."
Russell himself isn't one for re-watching his movies, and left the room while the boys watched Gladiator.
He said: "It's funny, you make films and I tend to see them when I'm at the premiere, and after that I never watch them again."
But even watching his movies at premieres has taken on a new dimension after a comment from his then-wife, Danielle Spencer.
He recalled: "My ex-wife said something funny one night when we were coming back from the opening night of 3:10 To Yuma and she said, 'It must be so hard watching yourself age on screen'.
"I was like, 'Well thanks very much, I'd never f****** thought of it from that perspective but now I will for the rest of my days, thank you for that gift'."
Russell insisted that there was "no pattern" at all to his career, as he judges each script on his merit.
On working with Ryan Gosling for The Nice Guys, he said: "We've both talked in the past about working together and had looked forward to the point where we would work together but we didn't realise it would be with a 6ft tall smoking bee in the back of the car."
The giant bee is called Bumble and is voiced by comedian Hannibal Buress.
Russell added: "There are aspects to this that neither of us have done before, which is I suppose why it was so attractive, you know?"
The Nice Guys is out now.