Arnold Schwarzenegger’s son Christopher shows off his massive weight loss in rare sibling photo

He and his bodybuilder father could be “Twins.”

Arnold Schwarzenegger’s son Christopher flaunted his inspiring body transformation in a rare photo with his siblings.

Christopher, 27, appeared slimmed-down while hanging with his family members in an Instagram snap posted by his sister Katherine Schwarzenegger on April 10.

The youngest son of Arnold and ex-wife Maria Shriver was seen looking svelte in a blue T-shirt and gray shorts as he smiled next to Katherine, 35, as well as their siblings Christina Schwarzenegger, 33, and Patrick Schwarzenegger, 31.

Their 27-year-old half-brother Joseph Baena — whom the “Terminator” star welcomed with their family’s former housekeeper after having an extramarital affair — was not in the photo.

“My favorites forever and always #nationalsiblingday,” the eldest sister captioned the photo.

Several fans flocked to the comments section of the post to rave about Christopher’s trim physique.

“Christopher is looking really good now!” one person cheered.

“Christopher looks a lot like Joseph, especially before Joe got into bodybuilding and they are about 5 days apart wow,” a second person wrote, referring to Baena’s muscular build.

“Such a beautiful family! 😍,” a third netizen gushed.

Patrick expressed his love for his siblings by commenting several heart emojis.

“MISS YOU GUYS,” the “White Lotus” actor added.

Christopher, who typically stays out of the spotlight, looked noticeably buffer in the new photo than he did in previous years.

In 2021, Patrick shared that his brother had committed to changing his lifestyle and getting in shape while celebrating Christopher’s birthday.

“Proud of you. New job. Crushing in the gym. Whole new person. Can’t wait to see what this year brings,” Patrick wrote of Christopher in a since-deleted Instagram post at the time.

In September 2022, Christopher debuted his impressive weight loss while attending Patrick’s star-studded birthday in Malibu, the Daily Mail reported.

Christopher clearly stayed committed to his health journey as he was spotted looking lean while leaving the gym in August 2023. He also looked fit at the “White Lotus” premiere in February.