Arnold Schwarzenegger’s love child Joseph Baena is identical to famous father as he shows off muscles in huge home gym

Arnold Schwarzenegger’s love child Joseph Baena is reminiscent of his famous father as he pumps iron at his massive home gym.

The 22-year-old flaunted his physique in a pair of purple short shorts, forgoing a T-shirt in the Los Angeles heat, as he worked his back and arm muscles while squatting during the video taken at his outdoor gym.

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He captioned the short video: "Back attack!

"What’s the first thing you’re gonna train when you get back into the gym?"

Joseph often and black and white slip-on Vans while standing on a balcony.

With the scenic Los Angeles landscape in the background, Joseph wrote: “Perfect time to practice some posing!"

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Fans were quick to compliment the photo, with one writing: “Like Father…. Like Son ! Freakin AWESOME!!”

He was revealed to have been fathered by the with household employee Mildred Patricia Baena in 2011.

The former Governor of California, 72, revealed he didn’t know the boy was his until he “started looking like me”.

Following the news, Arnold – who has spent time building his relationship with his son over the years – split from former wife Maria Shriver.

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He previously opened up on his love for his four children, saying: “It’s wonderful to watch them grow up, wonderful to watch them be successful, to reflect on the early days when you were teaching them things, discipline or sports or things like that.

"We all have a really great relationship.”