Cécile Cassel
French actress and singer

Cécile Crochon (French: [sesil kʁɔʃɔ̃]), better known by the stage name Cécile Cassel (born 25 June 1982), is a French actress and singer. Since 2002, she has appeared in a number of films and television series. She is also a recording artist using the stage name HollySiz.
Biography
She is the half-sister of actor Vincent Cassel and MC Mathias Cassel, and the daughter of Jean-Pierre Cassel. She has been in relationships with the French actor Gaspard Ulliel and the music producer Raphaël Hamburger.
Discography
Albums
Singles
*Did not appear in the official Belgian Ultratop 50 charts, but rather in the bubbling under Ultratip charts.
The public source identifies “Cécile Cassel” as french actress and singer. This brief keeps that definition visible, then builds a research path around Cécile, Cassel and French.
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Biographical claims are most persuasive when dates, appointments and relationships can be traced to records created close to the events described. The source revision retrieved here is dated Aug 24, 2026. The linked authority identifier is Q1232804. VIAF identifies the subject as 96828396. The Library of Congress control number is no2009122424. 5 of 5 selected statements include explicit references; 2 carry qualifiers and 1 use preferred rank. The first chronological checks are 1982 and 2002.
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This entry incorporates text from “Cécile Cassel” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.