[1] Born and raised in the Greater Western Sydney region, Felix attended Metella Road Public School[2] and St Patrick's Marist College before signing with South Korean record label JYP Entertainment.

[5][6][7] He was personally chosen by Stray Kids' leader, Bang Chan, to participate in the survival show after one year of training at JYP Entertainment.

[16][17] Felix made a cameo appearance in the music video for his labelmate NiziU's South Korean debut single "Heartris" in October 2023.

[19] As of November 2024, Felix has 24 song credits registered under his name with the Korea Music Copyright Association.

[21] In November 2023, he was named one of GQ Korea's Men of the Year and featured on the cover of the magazine's December issue.

[22][23] Felix made his runway debut at Paris Fashion Week for Louis Vuitton Women's Fall-Winter 2024 Collection at Cour Carrée on 5 March 2024.

[24] In May 2024, he made his Met Gala debut with Stray Kids as the guest of Tommy Hilfiger,[25] and attended Louis Vuitton cruise show 2025 in Barcelona.

[26][27] Felix made his New York Fashion Week debut at the Tommy Hilfiger Spring-Summer 2025 show in September 2024, attending as a guest alongside Lee Know.