Sofia Sergeyevna Thorup (née Prosvirnova, ; born 20 December 1997) is a Russian-born Danish short track and long track speed skater.
She competed at the 2014 Winter Olympics in the individual 500 m and 1,000 m events and in the 3,000 meters relay and placed 15th, 24th and 4th, respectively.
In April 2023, after marrying Danish speed skater Viktor Hald Thorup, Sofia Prosvirnova announced to switching nationality to represent Denmark, while also leaving short track for long track speed skating.
She qualified for the 2026 Winter Olympics, but she was denied of a Danish citizenship due to her path not being a good role model for youngsters, therefore she could not participate.