Prediction market platform Kalshi has signed Lionel Messi and Luka Modrić as brand ambassadors — and the timing is no accident. With the FIFA World Cup approaching, the platform is doing exactly what any ambitious gambling-adjacent company does when it wants mainstream credibility fast: it buys famous faces.
Messi's deal comes through a partnership with the Asociación del Fútbol Argentino, Argentina's governing football body. Modrić was brought on via the Croatian Football Association. Both have already pushed Kalshi content to their personal social media audiences — audiences that number in the tens of millions. The ads feature the Kalshi logo but deliberately leave out the trading interface, keeping the focus squarely on the celebrity rather than the product itself.
What Kalshi is actually building here
This isn't just a World Cup stunt. Kalshi has also signed Milwaukee Bucks star Giannis Antetokounmpo and actor Timothée Chalamet — yes, the guy from the Knicks courtside seats — to multi-year deals. Competitor Polymarket has confirmed it is preparing its own round of partnership announcements. Neither platform has disclosed spend, but University of Pennsylvania Wharton professor Elizabeth Johnson estimates deals like these can run into eight or nine figures.
The strategy isn't new. It's the oldest playbook in marketing: attach your brand to people audiences already trust. "We prioritize information that comes to us from people that we think have valuable input, and celebrities are in that category," Johnson told CBS News. Research she co-authored in 2023 confirmed that celebrity endorsements measurably increase product selection over non-celebrity alternatives.
Kalshi surged during the 2024 U.S. presidential election and has since locked in deals with the NHL, several major news outlets, and Venmo. Most of its trading volume is driven by sporting events, which makes the World Cup rollout a logical pressure point rather than opportunistic timing.
What it means for the platform's odds of breaking through
For Kalshi, getting Messi's face on your brand is a genuine statement of intent. His reach in South America, Europe, and North America simultaneously is something no other active footballer can match. Modrić adds credibility in central and eastern Europe. Together, they cover a serious chunk of the global football audience that will be watching this summer.
Whether the celebrity shine converts into sustained user growth is a different question. Prediction markets occupy a legally grey area in several jurisdictions, and no amount of star power resolves that. But as a brand awareness exercise timed to one of the sport's biggest tournaments? The math makes sense. "The platform is about sports betting and predictions, so they also know that they're capitalizing on a market that's happening right now," Johnson said. Hard to argue with that read.
