The sight of a muscled hunk holding a baby can turn female brains into mush, as Zac Efron just proved on Instagram.

The 35-year-old “High School Musical” alum just posted pictures of him cradling his three-year-old sister in his arms.

The cherub, Olivia gazes at her brother with pure love, and the expression on Efron’s face is nothing less than sheer tenderness.

Instagram has declared itself melted as Zac’s fans want him to be their baby daddy, more now than ever.

Many declared that their ovaries were on fire, although this angered some of his Instagram followers.

One comment admonished all these women to stop moaning about their ovaries, given that this was such a sweet and innocent brother-sister picture.

Efron has come a long way from his teenage bopper days and built an impressive physique.

He’s also very excited about his upcoming movie, “Iron Claw” where he plays a wrestler.

But the combination of his muscled arms holding a sweet baby girl is proving a tad deadly for his fans!