Sam Worthington, Alexa Davalos and Mads Mickkelsen - Clash of the Titans

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PHOENIX -- The new "Clash of the Titans," hits theaters this weekend, nearly 30 years after the original, starring Laurence Olivier and Harry Hamlin.

While the effects were fairly cool -- for 1981 -- this time, it's a whole new 3D world.

Alexa Davalos, Mads Mickkelsen and Sam Worthington, who plays Perseus and was seen most recently in a little film called "Avatar," talk about this updated flick. You can see it in 3D, but it wasn't originally made that way.