Zac Efron's brother is getting all the love from their little sister! Dylan Efron, who is the "High School Musical" alum's 31-year-old brother, took to his Instagram on Wednesday to share an adorable video of all the reasons why their 3-year-old half-sister loves him. "I love him very much and he's my brother. And I love him because Dylan's so strong to pick me up. Dylan can hang me upside down. Dylan just loves me. He just can't stop holding me. Dylan just can't stop doing that," Olivia says in the cute compilation video. Dylan hilariously captioned the adorable video: "Sorry Zac, I'm winning" with a red heart emoji. Zac and Dylan's dad welcomed Olivia with his second wife Jenny in 2019 and the "Baywatch" actor is always sharing adorable pics with his little sis. Most recently in June, he took Olivia and her little brother Henry to the circus, posting to his Instagram a cute pic holding the brother sister duo.