Australia
Cadel (@cadel__06) and Mia Van Haarlem (@mia.vanhaarlem) are an Australian couple and content duo who built a mega-tier YouTube presence largely on the momentum of the short-form video boom.
Total Followers +3.0%
28.3M
Across YouTube, Instagram, TikTok
Primary Platform
YouTube
26.9M followers · 95% of audience
Engagement
2.3%
vs. 1.5% category median
Sponsorship Tier
Mega
Est. $11K–$25K / IG post
The Sydney-based duo published an empty house tour on their channel, documenting their first home purchase together. The video drew 2.9M views.
The couple's first joint-channel video leaned into their most-asked audience question — whether they looked like siblings or a couple — and became a breakout viral moment that anchored the channel's rapid growth.
| Window | YouTube | TikTok | Combined | |
|---|---|---|---|---|
| Last 7 days | +100K +0.4% | +7K +0.9% | +0 +0.0% | +106K |
| Last 30 days | +826K +3.1% | +34K +4.9% | +0 +0.0% | +860K |
| Last 90 days | +4M +15.0% | +150K +21.4% | +0 +0.0% | +4.2M |
| Last 365 days | +4M +15.0% | +150K +21.4% | +0 +0.0% | +4.2M |
Daily follower snapshots from CreatorDB's longitudinal index.
Cadel (@cadel__06) and Mia Van Haarlem (@mia.vanhaarlem) are an Australian couple and content duo who built a mega-tier YouTube presence largely on the momentum of the short-form video boom. Sydney-based and uploading daily, they rose to prominence through a hook built on deliberate ambiguity — the 'siblings or dating' challenge, in which their close, playful dynamic left audiences genuinely unsure whether they were related or romantically involved. That format proved highly effective at driving curiosity-click behavior and subscriptions, and their rapid ascent to tens of millions of subscribers reflects how well the premise aligned with YouTube Shorts' discovery mechanics.
Beyond the viral hook, Cadel and Mia have progressively broadened their format palette into travel vlogs — including an eight-day Japan trip and domestic Sydney content — couple challenges, comedy sketches, and life-milestone posts such as a full house tour, signalling a channel moving toward longer-form storytelling without abandoning the quick-hit energy that built their audience. Their fanbase splits evenly across genders, a balance that is relatively uncommon at this scale and widens appeal for lifestyle, travel, and consumer brands. With engagement comfortably above the category median and steady growth continuing across both YouTube and Instagram, the duo appears well-positioned to convert a Shorts-driven subscriber base into a durable long-form and brand-partnership business.
Cadel and Mia reaches an audience concentrated in Australia primarily through YouTube, and is best activated via long-form YouTube integrations, Instagram Reels and Stories, TikTok branded content. As a vlog creator they map naturally to brands targeting that space. Engagement on YouTube runs around 2.3%, pointing to an audience suited to category-relevant, mid-funnel brand campaigns rather than pure-reach buys.
Benchmark estimates for a creator at Cadel and Mia's tier (Mega, 28.3M combined followers, Australia). Pulled from CreatorDB's category benchmarks.
The CreatorDB Agency runs end-to-end influencer campaigns globally — shortlisting, outreach, contracting, and performance reporting. Talk to our team about building a campaign around creators in this niche.
Cadel and Mia are a romantic couple, not siblings. Their whole viral identity is built around the "siblings or dating" challenge — viewers genuinely couldn't tell because of how similar they look — and the reveal confirmed they're in a relationship. That running ambiguity is the core hook that launched their channel.
Mia's full name is Mia Van Haarlem, and she goes by @mia.vanhaarlem on Instagram and TikTok. The duo's channel name is simply Cadel and Mia, which is why her surname isn't immediately obvious to new fans finding them through YouTube Shorts.
Yes — they documented buying and touring their dream house in a dedicated video on their YouTube channel. It's one of their longer-form uploads, standing out against their usual daily Shorts format, and it became a major milestone moment for their audience.
Yes, and Cadel and Mia explicitly warn about this in their YouTube channel bio, stating it is the only official Cadel and Mia account. Their verified handles are @cadelandmia on YouTube, @mia.vanhaarlem and @cadel__06 on Instagram, and their contact email is cadelandmia@gmail.com.
Cadel and Mia are from Sydney, Australia. Sydney features regularly in their vlogs and hashtags, and they've documented local life as well as international trips from their Sydney base.
Yes — they uploaded a full eight-day Japan vlog to their YouTube channel, which is one of their more in-depth travel videos. International trip content like this sits alongside their daily Shorts and couple-challenge videos as a recurring format.
Their growth was driven primarily by YouTube Shorts, which they post daily. The "siblings or dating" concept gave them a highly shareable hook — viewers would tag friends who couldn't tell whether the two were related — and the format spread rapidly across YouTube, TikTok, and Instagram Reels.
Based on their most recent content as of mid-2026, yes — they are still together and actively posting as a couple. Recent milestones like buying a house together and traveling to Japan as a pair suggest an ongoing relationship, and their channel branding continues to centre on couple content.
Their content mixes couple challenges, dance videos, pranks, sketch comedy, and travel vlogs. The daily Shorts keep their feed active with fast-moving challenge and reaction content, while longer uploads cover things like house tours and multi-day international trips.
Cadel and Mia have surpassed 26 million subscribers on YouTube, placing them firmly in the Mega creator tier and making them one of the largest Australian-based channels on the platform. Their stated goal is reaching 50 million subscribers, which they reference directly in their channel bio.
Stats (followers, engagement, audience demographics, growth) are pulled live from the CreatorDB API covering YouTube, Instagram and TikTok. Bio and FAQ content is AI-assisted; news items are sourced from cited public press at generation time. Read the full methodology →
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@cadelandmia · YouTube
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