| Karl Seldahl | |
| Birthname: | Karl Joni Wollter |
| Birth Date: | 1975 6, df=y |
| Birth Place: | Gothenburg, Sweden |
| Nationality: | Swedish |
| Occupation: | Actor |
| Yearsactive: | 1987–present |
| Parents: | Sven Wollter Viveka Seldahl |
| Relations: | Stina Wollter (half sister) Karl-Anders Wollter (uncle) |
Karl Joni Seldahl (born Wollter 12 June 1975)[1] is a Swedish film and theatre director and former child actor.
He was born in Gothenburg. He is the son of Sven Wollter and Viveka Seldahl. He studied at Dramatiska Institutet.