Wong Yuk-hei (Chinese: 黃旭熙; born 25 January 1999), known professionally as Lucas (Korean: 루카스), is a Hong Kong rapper signed under SM Entertainment.

[1] Lucas was born on 25 January 1999 in Sha Tin, Hong Kong, to a Chinese father with Teochew ancestry and a Thai mother.

[2][3][non-primary source needed] He has one younger brother and attended Tung Wah Group of Hospitals' Yow Kam Yuen College.

[3][non-primary source needed] In late 2015, Lucas was scouted by SM Entertainment after passing a Global Audition in Hong Kong.

[5] As an SM trainee, Lucas received training in modelling before switching to idol preparations and learning singing, rapping, and dancing.

[10][11] To promote the album, Lucas appeared on Korean variety shows Real Man 300 and Law of the Jungle in Last Indian Ocean as a regular cast member.

[citation needed] On 7 August 2019, Lucas was announced as a member of SuperM, a K-pop supergroup created by SM Entertainment in collaboration with Capitol Records.

[citation needed] On 25 August 2021, Lucas was scheduled to release the single "Jalapeño" alongside fellow WayV member Hendery.

The documentary followed Lucas through his daily life during his hiatus, and reflected on the events of the previous two years, stating: "I had terrible thoughts; I was so sorry I wanted to die, because honestly it was all my fault.

[29] On March 8, 2024, JTBC News reported that Lucas would be making his solo debut in April, with SM Entertainment confirming as such later that day.