Liam Hemsworth gets his good looks and physique from his mama ... and his daddy, clearly!
The youngest Hemsworth bro was out hiking Wednesday with his parents -- looks like they were in the Malibu Hills -- and even though he lovingly referred to them as "oldies" ... their bods are totally camera-ready.
This pic bodes well for Chris and Liam's futures -- their dad, Craig, is completely yoked, and mom Leonie looks like she's ready to run a marathon. Even the family dogs look fit!
With genes this strong ... the whole family's winning.