Jacqueline Cole Miskanic Gregg (born May 5, 1996),[1] known professionally as Jax, is an American singer-songwriter and social media personality.

Jax was raised in Atlantic Beach, New York,[2][3] and moved with her family in 2005 to East Brunswick, New Jersey.

[6] Her father, John, a Catholic of Italian and Croatian descent, was a firefighter who was injured on duty during the September 11 attacks, and her mother, Jill, a Jewish woman, is a New York City school teacher.

[7] After attending the East Brunswick Public Schools, Jax was homeschooled starting in the eighth grade in order to allow her sufficient time for voice lessons, performances, and recording.

[8][9] In mid-2014, she studied at New York University in London, where she won a John Lennon Scholarship in songwriting through the BMI Foundation.

In an Instagram post, Victoria's Secret CEO Amy Hauk thanked Jax for "addressing important issues in her lyrics.

"[22] Jax performed at every date on the 2022 iHeartRadio Jingle Ball tour, alongside artists including Jack Harlow, Black Eyed Peas, Khalid, Dua Lipa, Pitbull, AJR, Demi Lovato, Sam Smith, and Charlie Puth.

[25] In October 2023, Jax joined Canadian rock band Simple Plan for a re-recorded version of the track "Iconic" from their 2022 album Harder Than It Looks.