Joseph was born just five days apart from Christopher. That infidelity led to the separation of Arnold and Maria's marriage in 2011 after 25 years of being married.
Due to the revelation of this big secret, paparazzi and gossip magazines got to work to find out all possible details about the Schwarzenegger's private life, who had been "California's first couple" when the actor became a double-term Republican governor of the state.
Initially, such a commotion was stirred up that Joseph and his mother had to leave their humble home in Bakersfield, California, to settle for a while in Texas, as they did not want to be the protagonists of the news. However, in 2011, Mildred granted an interview to Hello! where she narrated that Maria had noticed the resemblance of our children and asked her if Joseph was her husband's son. Both ended up crying and embracing on the floor. "It was so strong. She cried with me and told me to get on my knees. We hugged and I told her that Noah was Arnie's fault, that it takes two," she confessed in the gossip magazine.
Joseph Baena decided not to use his father's last name because he wanted to build his own future. He grew up without luxuries and without any indulgence that would reveal who his real father was. And when the truth became public, Joseph wanted to continue living a normal life. He studied at a school in Brentwood and graduated in Business Administration from Pepperdine University, a very emotional moment, as both father and son shared a photo on Instagram the day he graduated. The proud dad wrote: "Congratulations Joseph! Four years of hard work studying business at Pepperdine and today is your big day! You have earned all the celebration and I am very proud of you. I love you!"
But no trace of his half-siblings. It is said that they do not maintain any kind of relationship and, of course, they have never posed together or spent any special dates as a family. Unlike when Arnold was one of the biggest stars in Hollywood who had to constantly film and, consequently, missed much of the childhood of the children he had with Maria, with Joseph it was different as he has made sure to be present in his most important decisions.
Currently, Joseph works as a real estate agent in the luxury sector for Aria Properties, although he has dabbled in acting and modeling. He also developed an unusual passion for bodybuilding at a very young age, which strengthened the bond between father and son even more, as in the 70s Arnold was Mr. Olympia. The young man has posted numerous photos imitating some of his father's poses showing off muscles.
In an interview with HollywoodLife in 2019, Joseph said: "He is a great father! That's really all I have to say about him! We train together, eat together. We do many things together. He's a joker! Sometimes he can be intense. He knows how to get things done. If he has to do something, he will do it. He takes his work seriously and what he does."
For the past six years, Joseph has been in a relationship with Nicky Didaj, who is not only an influencer but also an entrepreneur as she founded a luxury fashion line for men and women called Malibu Juice Club. Like any young couple, they go out to enjoy the night even if they have to kindly deal with the paparazzi.