Arnold Schwarzenegger’s son Joseph Baena posted a string of stunning shirtless snaps to Instagram on Friday.

The 23-year-old, who has followed in his father’s footsteps to become a bodybuilder, showed off the results of his hard work.

He struck a couple of poses flexing his astonishing muscles on his main page and also took the show to his Insta Stories.

Spitting image: Arnold Schwarzenegger’s (right) son Joseph Baena (left) posted a string of stunning shirtless snaps to Instagram on Friday

Before becoming a movie star and then a politician Arnie was a champion bodybuilder in his native land and was consequently known as the ‘Austrian Oak.’

In 1970 at the age of 23 he became the youngest ever winner of the bodybuilding title Mr. Olympia, but he retired from the sport a decade later.

Arnie legally took steroids as a young bodybuilder and dished about the experience to ABC News decades later while he was Governor Of California.

While he did not endorse steroids for contemporary use he said: ‘I have no regrets about it because at that time, it was something new that came on the market, and we went to the doctor and did it under doctors’ supervision.’

When you got it: The 23-year-old, who has followed in his father’s footsteps to become a bodybuilder, showed off the results of his hard work

Looking fab: He struck a couple of poses flexing his astonishing muscles on his main page and also took the show to his Insta Stories

He explained: ‘We were experimenting with it. It was a new thing. So you can’t roll the clock back and say: “Now I would change my mind on this.”‘

Joseph has now also taken his first acting role, a sci-fi comedy called The Chariot, in another career move that mirrors Arnold’s.

‘I’m following my father’s footsteps because I’m doing my own thing,’ Joseph told DailyMailTV in a recent exclusive interview.

‘I’m pursuing acting because I want to pursue acting. So really the pressure is just from myself,’ said the actor-to-be.

Remember when: As a young man Arnie was a champion bodybuilder in his native land and was consequently known as the Austrian Oak; pictured in Austria in 1966

His hope is to ‘just focus on myself’ and ‘drown’ out comparisons to Arnie, despite the fact the Terminator star is an ‘inspiration’ to him.

Arnie and his estranged wife Maria Shriver share four adult children – Katherine, 31, Christina, 29, Patrick, 27, and Christopher, 23.

Maria split from Arnold a decade ago after it emerged that he had fathered Joseph by the family’s housekeeper Mildred Baena.

Although Arnie is now dating a blonde 46-year-old physical therapist called Heather Milligan, his divorce from Maria has yet to be finalized.

As seen in 1976: In 1970 at the age of 23 he became the youngest ever winner of the bodybuilding title Mr. Olympia, but he retired from the sport a decade later