System 1 driver Oscar Piastri gained 237,585 Instagram followers in December 2025, main a month dominated by athletes, actuality TV stars, and wellness creators. Strongman Eddie Williams and girls’s well being physiotherapist Heidi Barlow adopted with large share positive aspects, whereas “Stranger Issues” actor Dacre Montgomery and wildlife conservationist Terri Irwin rounded out the highest tier.
Listed below are Australia’s fastest-growing Instagram accounts from final month.
#1. Oscar Piastri | @oscarpiastri
Gained: +237.6K followers
December whole: 6.1M followers
McLaren’s System 1 driver continued momentum from a powerful 2025 season.
#2. Eddie Williams | @eddiejowilliams
Gained: +176.2K followers
December whole: 547.9K followers
Two-time Australia’s Strongest Man and star of Netflix’s “Bodily: Asia” drove a 32% month-to-month surge.
#3. Heidi Barlow | @womenshealthwithheidi
Gained: +145.5K followers
December whole: 319.6K followers
Ladies’s well being physiotherapist and TikTok “Educator of the Yr 2025” specializing in pelvic ground and prenatal care.
Barlow’s progress displays the rise of credentialed educators who translate specialist data into short-form, extremely sensible content material. Her posts deal with pelvic ground well being, prenatal care, and girls’s physiology, i.e., subjects underserved in mainstream well being media however that carry out strongly on TikTok and Instagram Reels. As platforms more and more reward save- and share-heavy instructional content material, Barlow’s medically grounded, creator-native strategy positions her extra carefully as a data creator than a conventional wellness influencer.
#4. Terri Irwin | @terriirwincrikey
Gained: +118K followers
December whole: 1.1M followers
Wildlife conservationist and Australia Zoo proprietor maintained regular progress in her late husband Steve Irwin’s conservation legacy.
#5. Yana Marks | @yanammarks
Gained: +117K followers
December whole: 244.5K followers
“Love Island Australia” Season 7 contestant and founding father of Commerce Chicks posted a 48% month-to-month enhance.
#6. Chris Katelaris | @huge.chocky
Gained: +111.9K followers
December whole: 459.7K followers
On-line coach and podcast host often called “Australia’s controversial coach” grew his viewers by 24%.
Katelaris constructed his following by means of opinionated teaching content material, podcast clips, and direct-to-camera commentary that thrives on polarisation and debate. His framing as a “controversial coach” is a part of the content material technique, encouraging engagement by means of disagreement as a lot as alignment. In contrast to reality-TV-driven figures, Katelaris’ progress is algorithmic somewhat than event-based.
#7. Dacre Montgomery | @dacremontgomery
Gained: +106.3K followers
December whole: 7.8M followers
“Stranger Issues” actor added to his large following because the present’s last scheduled season approaches.
#8. Sooshi Mango | @sooshimango
Gained: +102.8K followers
December whole: 3.1M followers
Italian-Australian comedy trio selling their world tour throughout the U.S., the UK, Canada, and Europe.
Sooshi Mango has constructed its viewers by means of sketch comedy native to social platforms lengthy earlier than dwell excursions and model extensions. Their cultural humour interprets particularly nicely to short-form video, the place familiarity and repeatable characters drive retention. Their December progress aligns with tour promotion, however the underlying scale is creator-led somewhat than celebrity-driven because the account features as a long-running IP engine.
#9. Milly Alcock | @millyalcock
Gained: +94.8K followers
December whole: 2M followers
“Home of the Dragon” actress continued constructing her profile between seasons.
#10. Christian Watson | @1924us
Gained: +94.2K followers
December whole: 4.9M followers
Designer, artist, photographer, and animator behind the 1924us model and “Mr Skelly” character.
Watson’s account sits on the intersection of artwork, design, and web tradition, with progress fueled by visually distinctive content material tied to the “Mr Skelly” character and the broader 1924us universe. His work is optimized for visible stopping energy somewhat than private storytelling. The account operates extra like a artistic studio than a private profile, with Instagram serving as the first distribution channel for authentic visible IP.
#11. Grace Hayden | @grace.hayden_
Gained: +92.1K followers
December whole: 639.5K followers
Sports activities presenter, MC, and Mahindra Australia model ambassador specializing in style and life-style content material.
#12. Gabby McCarthy | @gabrielleemccarthy
Gained: +88.2K followers
December whole: 241K followers
“Love Island Australia” Season 7 solid member and health creator posted a 37% month-to-month achieve.
#13. Kapil Jain | @enrichwise
Gained: +84.2K followers
December whole: 132.3K followers
Private finance educator with IIM gold medal credentials grew his viewers by 64% educating investing and tax technique.
Jain’s emphasis on investing and tax technique, supported by educational credentials, positions his account inside the rising cohort of finance educators gaining traction by means of short-form explainer codecs. In contrast to aspirational wealth influencers, Jain’s content material depends on instruction somewhat than life-style signaling.
#14. Nathan Stafford | @nathanslawnsandgardens
Gained: +83.3K followers
December whole: 3.1M followers
Garden care creator identified for knocking on doorways and cleansing up yards without spending a dime.
Stafford’s format – providing free yard clean-ups – creates rapid visible payoff whereas embedding a story of group contribution. The account’s progress is completely creator-native, with no reliance on celeb, media appearances, or model sponsorship as the first hook.
#15. Nathan Lust | @itsnathanlust
Gained: +82.9K followers
December whole: 1.2M followers
New Zealand-born actor and director with 6M TikTok followers increasing his Instagram presence.
Actuality TV Surge
“Love Island Australia” Season 7 drove two contestants into the rankings:
- Yana Marks: +117K (48% progress)
- Gabby McCarthy: +88.2K (37% progress)
Knowledge from HypeAuditor, December 2025
Elevate your perspective with NextTech Information, the place innovation meets perception.
Uncover the most recent breakthroughs, get unique updates, and join with a worldwide community of future-focused thinkers.
Unlock tomorrow’s developments right now: learn extra, subscribe to our e-newsletter, and turn out to be a part of the NextTech group at NextTech-news.com
