Mr. Know It All (Teddy Swims song)

"Mr. Know It All" was written by Teddy Swims, together with Alexander Izquierdo, Ed Drewett, Rosie Danvers, Joshua Coleman, and Julian Bunetta, with the latter two and John Ryan co-producing the song. The track was described as a blend of "vintage '80s-inspired rock and R&B production".^[1]

According to Swims, the song "explores the idea that love can become a self-fulfilling contradiction". He further explained, "when you believe you already know how it ends, you protect yourself by holding back and that distance becomes the reason it fails. But when you try to fight that fate and control every outcome, you can end up suffocating the connection".^[2] Swims added that the track is a spin on Robert K. Merton's the prophet's dilemma.^[3]

The song was officially released as a single on April 10, 2026, through Warner. A music video was later released on Swims' official YouTube channel. Swims debuted the song live on the music festival Coachella 2026 that same day.^[4]

Credits are adapted via Tidal.^{[‡ 1]}

• Jaten Dimsdale – lead vocals, background vocals
• Julian Bunetta – background vocals, bass, drums, guitar, keyboards
• Ed Drewett – background vocals
• Joshua Coleman – drums
• John Ryan – drums

• Nathan Dantzler – mastering
• Alex Ghenea – mixing
• Jeff Gunnell – engineering
• Julian Bunetta – programming
• Harrison Tate – mastering assistance