Terminator star Arnold Schwarzenegger 's son, Christopher Schwarzenegger , has revealed a killer new body after a dramatic weight loss.

RadarOnline.com can reveal the 27-year-old, who is the youngest of Arnold's four kids with journalist ex Maria Shriver , appeared to be half the man he used to be during a day boating in Massachusetts with relatives. Tap Here To Add Radar Online as A Trusted Source Article continues below advertisement

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His sister Katherine , who is married to Guardians of the Galaxy superhero Chris Pratt , posted a photo online of her much littler brother wearing a shirt and shorts.

Christopher's muscle-bound dad is known for his physique and won the Mr. Olympia bodybuilding contest seven time

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