Arnold Schwarzenegger's son Joseph Baena proves to be dad's spitting image in ...

He is the son of professional bodybuilder turned action film star Arnold Schwarzenegger.

And Joseph Baena, 22, proved to be the spitting image of his famous father, 72, on Wednesday afternoon when he took to Instagram to show off his impressively muscular physique. 

'Perfect time to practice some posing,' captioned the fitness model, who could be seen flexing his built back and bulging biceps to the camera.

Flexing: Joseph Baena proved to be the spitting image of his famous father Arnold Schwarzenegger on Wednesday afternoon when he took to Instagram to show off his impressively muscular physique

Spot the difference: Joseph's father Arnold posing at the top of his form in October 1976, when he was aged 29

Flexing: Joseph Baena proved to be the spitting image of his famous father Arnold Schwarzenegger on Wednesday afternoon when he took to Instagram to show off his impressively muscular physique

Baena posed sans shirt on a lavish glass balcony, while the rain drizzled over the Los Angeles landscape.

For the photo, Joseph donned black, fitted sweatpants paired with black and white checkered Vans slip-ons. 

The body shape and pose looked exactly like the famous photo of his father taken in October 1976, when Arnold was aged 29.  

Meanwhile, on Saturday, aspiring actor Joseph used his Instagram Story to host a live workout session.

To promote the free routine, Baena flaunted his stella physique in a pair of itty bitty red shorts, while flexing for his audience. 

Scandal: Joseph is Schwarzenegger's love child with former housekeeper Mildred Baena, which made headlines in 2011; Arnold and Joseph pictured in 2018

Scandal: Joseph is Schwarzenegger's love child with former housekeeper Mildred Baena, which made headlines in 2011; Arnold and Joseph pictured in 2018

Free fitness: On Saturday, the aspiring actor used his Instagram Story to host a live workout session

Free fitness: On Saturday, the aspiring actor used his Instagram Story to host a live workout session

Joseph often uses his Instagram page to document and promote his fitness journey - even posting photos of himself at the gym with dad Arnold.

Schwarzenegger famously won the Mr. Olympia

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