 Thilleman, who stands tall, competed as Miss Bretagne in her country's national beauty pageant, Miss France 2011, held in Caen, where she would become the eventual winner of the title, gaining the right to represent France in the 2011 Miss Universe.Thilleman was France's contestant in Miss Universe 2011 pageant held in São Paulo (Brazil) and ranked in top 10 (6th runner up), her 2nd runner-up in Miss France pageant, Clémence Olesky (Miss Auvergne) represented France at the Miss World pageant, held in London.In a phone interview with the newspapers "Première", she had been asked what she thought about the pageant winner (Leila Lopes, Miss Angola), she replied, ""She was the only girl I didn't know very well.