Holly from Big Brother (Australia 2025 contestant Holly Young) is 31 years old.

Quick Scoop

  • Multiple entertainment outlets describe Holly (Holly Young) as a 31‑year‑old model and influencer from Western Australia on Big Brother Australia 2025.
  • Coverage of her in‑house romance with Colin also explicitly refers to her as 31 in contrast to his age of 21.

So, if you’re asking “how old is Holly Big Brother” in the current 2025–2026 run, the publicly reported age is 31.

Information gathered from public forums or data available on the internet and portrayed here.