Instagram/Timothée Chalamet & Kylie Celebrity Timothée Chalamet's ex reveals 3-year on-off romance, feeling blindsided by his swift move to Kylie Jenner. She describes his genuine care and their unspoke... March 22, 2026 AceShowbiz - Timothée Chalamet's former partner Sarah Tena has revealed details about their relationship, claiming she was blindsided when the actor began dating Kylie Jenner shortly after their breakup. Sarah, who describes their romance as lasting on and off for three years, expressed feeling disrespected by how abruptly Timothée Chalamet moved on.