Ultra’s recent story shares featuring Martin Garrix and Alesso have led to speculation about a possible B2B appearance at Ultra 2026. Both artists were missing from the festival’s Phase 1 lineup, yet their appearance across Ultra’s social channels has started new conversation. The two already share a notable performance history, beginning with their first B2B at Tomorrowland 2023 on the Library Stage hosted by STMPD RCRDS, followed by their live performance of Inside Our Hearts at Ultra Europe 2025. With Ultra now referencing both artists again, talk of a Miami reunion has started to gain traction.

Their connection began at Tomorrowland 2023, where the surprise B2B became one of the standout moments of the festival. The performance combined Alesso’s melodic progression with Martin Garrix’s mainstage approach, previewing early versions of Inside Our Hearts. When the completed version of the track was released with vocals by Shaun Farrugia, it reflected the shared dynamic that had first appeared during their set.

When Martin Garrix and Alesso reunited at Ultra Europe 2025, their onstage chemistry was already clear. The performance marked the first official live showcase of Inside Our Hearts and confirmed how well their styles complement each other. It also renewed discussion about when they might appear together again, especially since Ultra Miami often features collaborations that bridge different corners of the global festival scene.

@brithousemafia INSIDE OUR HEARTS IS ALIVE 😭 2.5 years have passed. We have been waiting for this for so long. It’s finally here 💙 #martingarrix #alesso #insideourhearts #ultra #umf #ultraeurope #croatia #stmpd #tml25 #progressivehouse #electronicmusic #dancemusic ♬ original sound - Brit House Mafia

Ultra’s Phase 1 lineup rollout has left both artists unannounced, but the festival’s recent story shares featuring them have added a sense of curiosity. No official confirmation has been made, although Ultra often teases special sets through subtle social posts before a full reveal. The timing of these updates, alongside the pair’s ongoing connection, suggests that something could be in development.

If Martin Garrix and Alesso return to the same stage at Ultra 2026, it would be their first joint appearance in Miami and a continuation of the timeline that began in Belgium and carried through Croatia. Whether it leads to a full B2B or a short crossover, the pairing would fit naturally within Ultra’s record of unexpected collaborations and festival highlights.