October 14, 2025 - Zac Efron celebrating his sister Olivia's 3rd birthday in December 2022.

October 9, 2025 - Zac and Dylan also have a younger sister named Olivia and a younger brother named Henry. ... Zac Efron has been open about his bond with his family over the years. Zac, who rose to fame after playing Troy Bolton in Disney Channel's High School ...

We cannot provide a description for this page right now

September 15, 2025 - His father, David Efron, is an ... works at Diablo Canyon. Efron has a younger sister and two younger brothers, including Dylan Efron, and had, as he has described, a "normal childhood" in a middle-class family....

September 17, 2023 - So sweet. Random fact:: They are from when I’m from. When Zac was a kid, he did a lot of local musical theater. My little brother and sister did a lot of it with him . I remember him and my much younger siblings doing shows and stuff when they were like 11.

March 24, 2025 - Nobody knew about her existence until her brother, Zac, posted a photo on his Instagram account on July 19, 2021, with the caption ‘My sister Olivia, little heartbreaker.’ · Olivia is Zac’s step-sister as she was born from her father’s second marriage.

June 5, 2024 - Zac’s only sister, Olivia, was born to David and his wife on Dec. 25, 2019. Since then, the little girl has stolen Zac and Dylan’s hearts as they frequently post with her on their Instagrams.

October 31, 2025 - Both Zac and Dylan publicly praise each other and maintain a close sibling bond. Dylan Efron is a reality TV contestant and producer; Olivia and Henry are younger half-siblings.

February 28, 2023 - RELATED: Everything We Know About ... a sister as well. On July 18, 2021, he posted an Instagram photo of himself and his baby sister Olivia....

November 25, 2025 - Born on Christmas day in 2019, Olivia is the first child of David Efron and his current wife, Jenny. Though there’s a sizable, 28-year age difference between Olivia and her next oldest brother, it’s clear this age gap hasn’t stopped the siblings from becoming super close. Zac’s fans will have spotted his adorable sister on his Instagram page frequently, with the High School Musical star sharing this sweet picture of him reading a book to Olivia, affectionately calling her “my Valentine” in the caption.

We cannot provide a description for this page right now

October 15, 2025 - Olivia is the only girl in the Efron family. Born to David and his new wife in December 2019, the toddler has appeared on both her older brothers’ Instagram accounts. Zac and Dylan even have a comical rivalry over which sibling Olivia prefers ...

We cannot provide a description for this page right now

October 14, 2025 - Zac Efron Instagram Zac Efron celebrating his sister Olivia's 3rd birthday in December 2022

December 13, 2023 - Who are Zac Efron's siblings? Here's everything you need to know about the actor's brother, Dylan Efron, and half-siblings, Olivia and Henry Efron.

We cannot provide a description for this page right now

February 14, 2023 - Did you know Zac Efron has a little sister named Olivia? The Disney Channel alum has shared photos of his half-sister in multiple Instagram posts,which have tugged on many fans’ heart strings.

We cannot provide a description for this page right now

March 18, 2025 - Zac Efron has documented his close connection to his family, which includes brother Dylan and sister Olivia — see the photos

Younger sister of the famous actor Zac Efron. She has appeared on his Instagram, where he has over 50 million followers.