"He never became a movie-star brat."
Bill's rare praise of a child actor has certainly worked wonders for Jaeden as the veteran actor helped to get the youngster a part in his latest movie, an untitled Cameron Crowe romantic-comedy which is also set to star Bradley Cooper, Rachel McAdams and Emma Stone.
When asked if he would be prepared to work with Jaeden again, Bill replied: "I already have. I was making a movie with Cameron Crowe after I finished this one and Cameron asked me what I thought of him.
Bill Murray in a scene from St Vincent.
"I said, 'I don't like kid actors.' Three days later, I had to call him and say, 'OK, this kid's good.' The next day, Cameron hired him."
But Bill admits he is very selective when it comes to choosing his own roles and refuses to have an agent because they used to show him so many "crap" scripts.
He added to Metro newspaper: "Agents don't get paid if you don't work, so they're constantly jamming stuff in your face - mostly stuff from other clients in their own agency.
"I remember saying, 'Please don't ever give me another script written by these people. Ever.' Because there are some writers in Hollywood who just churn out crap."
- Bang! Showbiz