The rumoured romance between Tessa and English singer Dev Hynes seemingly began in 2019, when the couple was photographed taking a stroll in Paris, attending Wimbledon in London, and shopping in New York. In early 2020, Dev and Tessa were seen cosying up at an after-party for the Sundance premiere of Sylvie's Love before sitting front row of Milan Fashion Week. It's unclear when the two fizzled out as neither ever publicly confirmed the relationship.