Will Smith dropped into the Late Show with David Letterman last night to talk up his new film Seven Pounds but ended up chatting more about his sons - and how ten year old son Jaden Smith should be looking for a new place to live if his film The Day The Earth Stood Still keeps Seven Pounds off the No 1 slot for box office takings.

He added that it’s also terrifying to be driven around by 16 year old son, Trey.

(Just a short clip for now. More to follow.)