Zac Efron

Zac Efron reunited with his family to celebrate his little sister's birthday during the holiday season — all the details.

Efron and Hudgens [have remained tight-lipped about potential cameos in the upcoming season.](https://www.usmagazine.com/entertainment/pictures/high-school-musical-cast-members-weigh-in-on-possible-returns-to-the-franchise-my-heart-is-still-there/) [Vanessa Valladares](https://www.usmagazine.com/celebrity-news/news/why-zac-efron-wasnt-ready-to-get-serious-with-vanessa-valladares/) for less than a year in 2021. More than a decade after their 2010 split, the former couple [raised eyebrows with their separate trips to East High](https://www.usmagazine.com/celebrity-news/news/zac-efron-visits-east-high-1-month-after-ex-vanessa-hudgens/) in Salt Lake City, Utah. [noted that he formed a bond with the actress](https://www.usmagazine.com/entertainment/pictures/high-school-musical-stars-then-and-now/) who played his onscreen daughter, Ryan Kiera Armstrong. In one photo, Efron [hugged a child as they unwrapped gifts](https://www.usmagazine.com/celebrity-news/pictures/christmas-2022-how-the-stars-celebrated-in-photos/). [he didn’t consider how much work would go into playing a dad](https://www.usmagazine.com/celebrity-news/pictures/high-school-musical-casts-dating-history-through-the-years/) on screen. [the only glimpse the former Disney Channel star](https://www.usmagazine.com/celebrity-news/pictures/the-most-iconic-disney-channel-couples-of-all-time/) gave at his Christmas Day celebration. “Do you remember in kindergarten how you’d meet a kid and know nothing about them, then 10 seconds later you’re playing like you’re best friends because you didn’t have to be anything but yourself?” The actress wrote alongside an Instagram video of her dancing in front of the school, quoting the film. He continued: “We had a pretty heavy dad-daughter scene right off the bat [when filming started], and I realized I was drastically underprepared for this part. “It was a pretty quick intro to the film — and all the sudden I had this daughter.” In the sweet photos, Efron and Olivia share a look before he kisses the little girl on her head. I love you so much mom.”