He began his career playing minor roles in the early 2000s, and has since starred in the television series The Staircase (2022), American Sports Story (2024), and the third season of The White Lotus (2025).

He is the eldest son of author and journalist Maria Shriver and Austrian-born bodybuilder, actor, and former Governor of California Arnold Schwarzenegger.

His first leading role was opposite Bella Thorne in 2018's Midnight Sun, a romantic drama about a teenage girl with a rare medical condition.

[18] In 2023, Schwarzenegger portrayed Luke Riordan / Golden Boy, a young man with superpowers described as "a 22-year-old big name on campus who possesses thermonuclear power and pure charisma.

Schwarzenegger later sold his Blaze Pizza shares and began investing in young entrepreneurs who were creating companies to meet the demand for healthier food and beverage alternatives.

[27][28] Jonathan Jarry at the Office for Science and Society pointed out the ingredients used in the MOSH bar do not conclusively improve brain health.