Arnold Schwarzenegger's love child son Joseph is now officially a professional bodybuilder like his father, after winning another huge competition this weekend.
Baena, 28, is following in his father's footsteps and won his first competition on his debut in Denver, Colorado last weekend.
Just seven days on, Baena continues to go from strength to strength, and has now officially earned himself pro status after triumphing in California to win the INBA Iron Gladiator Classic Physique title.
Baena celebrated his success on Instagram, bizarrely posing on stage with a sword and shield as his friends took photos of him flexing his ripped muscles.
It marks the next stage of a hugely successful start to his career, just a week on from winning a trio of titles in Colorado - the Men's Open Bodybuilding Heavy Weight Class, Men's Classic Physique True Novice, and Men's Classic Physique Novice.
Joseph has even been training alongside his famous father Arnie, now 78, at Gold's Gym in Venice Beach, with the former Governor of California seen helping his son perfect one of the signature moves from his heyday.
Joseph Baena flexes on stage during his INBA Iron Gladiator Classic Physique win on Saturday
Baena celebrates on stage after becoming a pro bodybuilder like his famous father Arnold
Schwarzenegger enjoyed an illustrious career as a competitive bodybuilder, winning seven Mr. Olympia titles before becoming Hollywood royalty and eventually turning to politics.
Out of all five of Schwarzenegger's children, Baena has followed in his footsteps the most, despite primarily growing up with his housekeeper mother, Mildred 'Patty' Baena, in Bakersfield, CA.
The Pepperdine University grad was only 13 in 2011 when Arnold revealed he secretly fathered him during a 'one-night stand' with his former housekeeper, which ended his 25-year marriage to journalist Maria Shriver. Their divorce was finalized in 2021.
Last year, Maria admitted in her poetry book I Am Maria that the divorce 'broke my heart, it broke my spirit, it broke what was left of me.'
She added: 'Without my marriage, my parents, a job, the dam of my lifelong capital-D Denial just blew apart.'
Baena was only 13 in 2011 when Arnold revealed he secretly fathered him with a housekeeper
Joseph and the FUBAR producer-star first bonded over fitness, and he gifted him a copy of The Encyclopedia of Modern Bodybuilding, which he co-authored in 1985.
'My dad is old-school; he doesn't believe in handouts. He believes hard work pays off, and so do I,' the Dog Patrol: Operation Santa Paws actor told Men's Health in 2022.
'I love the word honour, and I'm very prideful in the sense that if I use my dad's contacts or ask him for favours, I wonder what honour is that gonna bring me?'
Arnold has five children: Katherine, Christina, Patrick, and Christopher with his ex-wife Maria Shriver; Joseph with Mildred.