She was born to a mathematician father and a mother who restores paintings, and she was a student in one of the oldest and most prestigious French high schools, Lycée Condorcet, in Paris.

[5] In 2008, she appeared as a coroner in the thriller Bloody Flowers directed by Richard J. Thomson and starring Amanda Lear.

[6] In September 2012, she became a witty weather girl on a famous access prime time TV show called Le Grand Journal on Canal+, succeeding Solweig Rediger-Lizlow.

In June 2015, on the occasion of the ten years of the popular TV show Salut les Terriens!, she performed a song in homage to the star presenter Thierry Ardisson with music by Barbara, written by Nicolas Bedos who accompanied with the piano.

[9] In March 2017, Tillier starred in the leading role in the film M. & Mme Adelman, directed and co-starred by her former companion Nicolas Bedos, with a screenplay written by them both.