It's another trip around the sun for Christopher Schwarzenegger. On Saturday, September 27, the producer rang in his 28th birthday, for which his sister Katherine Schwarzenegger shared a round of photos — some highlighting his recent weight loss transformation — along with a heartwarming tribute. Katherine, 35, and Christopher are the eldest and youngest kids of Maria Shriver and Arnold Schwarzenegger, who were married from 1986 to 2011, and who are also parents to Christina, 33, and Patrick, 31, plus the Terminator star shares son Joseph Baena, who will be 28 October 2, with the family's former nanny Mildred Baena.
In honor of Christopher's special day, Katherine took to Instagram and shared a round of photos of him throughout the years, writing: "Happy happy birthday to my sweet baby brother Christopher. You are the best human I know. I love you so much."
Fans were then quick to take to the comments section under the post and gush over it, with one writing: "The first picture is too much. HBD Christopher!!!" as others followed suit with: "There's something so beautiful about sibling love like this. Your nervous system probably feels so grounded when you're around people who've known you your whole life and love you exactly as you are," and: "He is so handsome. HBD Christopher," as well as: "He seems like a kind person."
Scroll below for the photos Katherine shared and more snaps of Christopher.