The Young and Dangerous film series (Chinese: 古惑仔電影系列) is a collection of Hong Kong films about a group of young triad members, detailing their adventures, dangers and growth in a Hong Kong triad society.

The series contributed a lot to the public image of triads and was condemned by certain quarters as glorifying secret triad societies.

However, it was immensely popular in Hong Kong and spawned nine sequels and spin-offs.

Its main actors and actresses have also become major stars in their own right.

Andrew Lau served as cinematographer and director for parts 1, 2, 3, 4 and 5 as well as the spinoff Born to Be King and the prequel film, with radio personality Manfred Wong writing scripts for the ongoing franchise.