Moondoggie
In the three motion pictures "Gidget" , "Gidget Goes Hawaiian" and "Gidget Goes to Rome" , Moondoggie is portrayed by James Darren , the only character to be played by the same actor in all three films . 
<triplet> Gidget <subj> James Darren <obj> cast member <triplet> Gidget Goes Hawaiian <subj> James Darren <obj> cast member <triplet> Gidget Goes to Rome <subj> James Darren <obj> cast member <triplet> Moondoggie <subj> James Darren <obj> performer