Arnold Schwarzenegger’s love child Joseph is deadringer for bodybuilder dad

Arnold Schwarzenegger 's love child Joseph Baena looked just like him as he lifted heavy weights in the gym.

The fitness enthusiast, 22, took after his bodybuilder father as he gave fans a glimpse at his gruelling workout regime on Thursday.

He was filmed pumping iron as he worked hard to build muscle on his body.

Joseph was lifting a very heavy barbell as he strained to successfully bring it up to his chest and back down again.

He appeared to be following in his father's footsteps in fitness as he shared the workout to Instagram.

The star seemed to be in a professional gym set-up, and was filmed by one of his peers.

His bulging biceps were on full display as he went shirtless for the video.

Joseph wore a pair of black basketball shorts and a training belt to assist him while lifting the extremely heavy weights.

Arnold's son is his love child to former mistress Mildred Baena.

Their secret was kept for 13 years, until Arnold's ex-wife Maria Shriver confronted Mildred over suspicions she was secretly raising his love child.

Maria is said to have asked her family's housekeeper if her son was fathered by Arnold.

Reports at the time claim Mildred confessed during the dramatic showdown.

Arnold only came clean about the sordid affair after Maria told him she new the truth about his 13-year secret.

A source told Radar Online: "Maria has suspected this for a long time and she asked the housekeeper. The housekeeper admitted it.

"Maria then went to Arnold and he confessed."

TMZ also reported that Arnold showered Mildred's family with money during her time working for the family.

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