Cirkut

Henry Russell Walter (born April 23, 1986), known professionally as Cirkut, is a Canadian record producer and songwriter. He has produced and co-written commercially successful singles since 2008. His credits include songs and albums for prominent artists including Katy Perry, Becky G, Ava Max, Nicki Minaj, Lady Gaga, Charli XCX, R. City, The Weeknd, Kesha, Ciara, Pitbull, Britney Spears, Maroon 5, Ne-Yo, Rihanna, Adam Lambert, B.o.B, Marina and the Diamonds, will.i.am, Jungkook, Kygo, Juicy J, Sam Smith, and Ed Sheeran, among others. He has numerous collaborations with American record producer Dr. Luke and Swedish producer Max Martin. Walter has written and produced the Billboard Hot 100-number one singles "Part of Me", "Roar" and "Dark Horse" by Katy Perry, "Wrecking Ball" by Miley Cyrus, "Girls Like You" by Maroon 5, and "Starboy" and "Die for You (Remix)" by the Weeknd. He co-produced Jungkook's 2023 single "Standing Next to You". He has co-written and produced every song on Becky G's Play It Again, R. City's What Dreams Are Made Of, Ava Max's Heaven & Hell and Diamonds & Dancefloors, and Lady Gaga's Mayhem. Walter has won four Grammy Awards, including Best Urban Contemporary Album for the Weeknd's Starboy, Best Dance Pop Recording for Lady Gaga's "Abracadabra", Best Pop Vocal Album for Mayhem, and was named the 2026 Producer of the Year.