Ann-Charlotte Gun Lilja (also Ann-Charlott; born 10 June 1946) is a Swedish swimmer who won a silver medal in the 4 × 100 m freestyle relay at the 1966 European Aquatics Championships. Two years earlier at the 1964 Summer Olympics she finished fifth in the same event and eighth in the 400 m freestyle.
|Born||10 June 1946|
|Height||1.71 m (5 ft 7 in)|
|Weight||54 kg (119 lb)|
|Club||SK Najaden, Göteborg|
As of 2010, she was still competing in swimming in the masters category.