Christina was born on 23 July, 1991. She has worked as an executive producer on the Netflix franchise "Take Your Pills" and was formerly a health and wellness editor at Goop for three years. Christina also serves as a council member for the Special Olympics, where she was a founding member of the organisation's Founder's Council.

"I love shining a light on those who feel outside the margins and bringing their experiences to light," Christina said in a quote on the Special Olympics' website. "The result is that we all feel validated and, ultimately, see that our differences are in fact, our superpowers."

Christina attended and graduated from Georgetown University, where her mum, Maria, also went to school, as per People. Like all of his kids, Arnold is proud of Christina's personal accomplishments and loves to praise her on social media. "Happy birthday, my little sweetheart (schpatzl)! I can't believe you're 30!" he wrote in a post in 2021. "From your unbelievable work on enlightening documentaries to giving back by helping Special Olympics to your fantastic artwork that blows mine out of the water. I enjoy nothing more than hanging out with you, whether we are training together or travelling the world. You will always be my little Leo and I love you!"

Patrick was born on 18 Sept., 1993. Over the years, he has created a career for himself in both acting and modelling. He also cofounded a charitable clothing company named #Project360 and a protein-bar brand called MOSH.

In May 2022, Patrick talked to Insider about how his dad was a huge fan of "The Staircase," a true-crime drama in which he starred as Todd Peterson, though he did not go to Arnold for advice on the role. "A lot of sons go to their father for advice with anything," Patrick said. "I definitely go to him like that, but I didn't go to him for this specific character."

In 2021, Arnold honoured Patrick on his birthday, writing, "Happy birthday @patrickschwarzenegger! I love you, I'm proud of you, and watching you grow every day in every way is one of my greatest joys. Your business is booming, your acting career is taking off, but most importantly, you never forget to reach out and help others."

In his personal life, Patrick has been in a long-term relationship with model Abby Champion, whom he often gushes over on Instagram, showcasing their romance and fun travels.

Christopher was born on 27 Sept., 1997. While he primarily keeps private, it's known that he graduated from the University of Michigan in 2020. "Christopher, you are a champion and I love you," Arnold wrote in a celebration post on Instagram at the time, per People. "I know your graduation from Michigan wasn't the big celebration you dreamed about for years, but walking across a stage isn't what makes me so proud of you: it's your compassion, your hard work, your vision, your critical thinking, and your selflessness that make me burst with pride. I can't wait to watch you keep climbing and succeeding."

The following year, Arnold also gushed over Christopher on his birthday, writing on Instagram, "Happy birthday Christopher! I love you and I'm proud of you every day! You're so smart, and you have such a big heart. Between your boxing classes, your weightlifting classes, your stretching classes, your cycling classes, and on and on, I can't even keep up with you! I can't wait to see what you accomplish this year."

Joseph was born on 2 Oct., 1997. As previously mentioned, it wasn't until 2011 that Arnold went public with the news that he had fathered Joseph, whose mother was the bodybuilder's longtime housekeeper. Over the years, Arnold and Joseph's relationship has continued to flourish and become more public. Joseph has followed in Arnold's footsteps, working as both a bodybuilder and actor.

In May 2023, Joseph walked the red carpet with his dad at the premiere for Netflix's action-spy comedy "Fubar." Speaking to Variety, Joseph shared, "It's always cute seeing his vulnerable, little fatherly side. I love it." Joseph also spoke about the advice his dad gives him, saying, "The main thing he always tells me is, 'You gotta put the reps in. It's practice, practice, practice.'"

In 2021, Arnold praised Joseph on Instagram, writing, "Happy birthday @projoe2! I am so proud of you and I love you! You are crushing it in the gym, in your real estate career, and in acting. I know this will be another fantastic year."