Sebastien Prince of Luxembourg
- Category : 1992-births
- Type : GP
- Profile : 1/3 - Investigating / Martyr
- Definition : Split - Large
- Incarnation Cross : RAX Laws 1
Luxembourgian royalty, the fifth and youngest child of Grand Duke Henri and Grand Duchess Maria Teresa.
Prince Sébastien has four siblings Hereditary Grand Duke Guillaume (who served as his godparent along with Princess Astrid of Belgium), Prince Félix, Prince Louis, and Princess Alexandra. He is currently fifth in the line of succession, after his two brothers, niece, and sister; Prince Louis gave up his and his descendants' succession rights.