He is a grandson of Queen Margrethe II and Prince Henrik, and a nephew of King Frederik X. Felix is currently seventh in the line of succession to the Danish throne.

His godparents are his maternal aunt, Martina Bent; and friends of his parents, Count Christian Ahlefeldt-Laurvig, Oscar Davidsen Siesbye, Damian Sibley and Annick Boel.

At the christening, the musical work Dåbens Pagt composed by Frederik Magle, dedicated to Prince Felix, saw its inaugural performance.

The prince attended pre-school at the Garnison Church in Copenhagen, and at age six, followed in the footsteps of his father, brother and uncle at Krebs School in Østerbro.

[5] In October 2021, he left his (2 year long) Army's Lieutenant Training, which he had begun in August, at the Gardehus Barracks in Slagelse, south-west of Copenhagen.