Leonardo DiCaprio would be too old now to play a 19 year old Sonny.

Ever noticed how Frank d'Ambrosio (Anthony in GF3) looked more like a very young James Caan then DiCaprio will ever do?

anyway, if a GF4 was to be made, the casting should be PERFECT, which means, no fooling around with ages and computers etc... get a teenager to play a teenager... like Coppola wanted Italians to play Italians, etcetera. Sure it will be hard to find them...

I have nothing against DiCaprio or Scott Caan or whoever, but they are too old to play those parts to were once linked with.