ET has the latest...

He's only been a daddy for a little over a month now, but Matthew McConaughey already has words of wisdom for his baby son Levi, born to he and girlfriend Camila Alves last month.

In an interview with CNN's Dr. Sanjay Gupta, the 'Fool's Gold' star says he's going to give Levi the same advice his own father gave him: "Don't lie and don't say 'I can't.'"

Meanwhile, the buff actor goes on to say that his son will only eat organic food and will not be allowed goodies like gum, soda or candy!