PHOTOS: Movie Magic - How "Surfer" Actress Will Have Arm Missing In Film

Jack Nicholson's daughter Lorraine and fellow actress AnnaSophia Robb were snapped Thursday on the Oahu, Hawaii set of Soul Surfer, a biopic based on the life of Bethany Hamilton, the inspirational surfer who lost her arm at 13 following a shark attack.

In these shots, we see Hollywood magic at work, as Robb wears a green sleeve over her arm that will be digitally erased for the final product to reflect Hamilton's disability.

Robb 16, and Nicholson, 19, both clad in bikinis, knocked out sets of crunches in between takes.

Soul Surfer also features another second-generation actor, Pierce Brosnan's son, Sean.