| Siilmann, Riina | Riina Siilmann | Costume Designer | 1997 | 1 | |
| Siikaluoma, Heikki | Heikki Siikaluoma | Actor | 1996 - 2002 | 2 | |
| Siikala, Ritva | Ritva Siikala (Ritva Siikala) | Adaptation, Director | 1977 - 1996 | 28 | |
| Siikala, Kaija | Kaija Siikala (Kaija Siikala) | Director | 1969 - 1979 | 2 | |
| Sihler, Jürgen | Jürgen Sihler | Actor | 2003 - 2004 | 8 | |
| Sigurth, Peter | Peter Sigurth (Peter Sigurth) | Actor | 1907 - 1908 | 16 | |
| Sigurjónsson, Stefán, Sturla | Stefán Sturla Sigurjónsson | Actor | 1998 - 2014 | 2 | |
| Sigurjónsson, Sigurður | Sigurður Sigurjónsson | Actor | 1991 - 1996 | 3 | |
| Sigurjónsson, Hermann | Hermann Sigurjónsson | Actor | 1975 | 1 | |
| Sigurðsson, Þórhallur | Þórhallur Sigurðsson | Actor, Director | 1996 - 2001 | 2 | |
| Sigurðsson, Sigurður, E. | Sigurður E. Sigurðsson | Actor | 1978 | 1 | |
| Sigurðsson, Jón | Jón Sigurðsson | Actor | 1978 | 1 | |
| Sigurðsson, Ingvar E. | Ingvar E. Sigurðsson | Actor | 1991 - 2018 | 24 | 4 |
| Sigurðsson, Haraldur, Á. | Haraldur Á. Sigurðsson | Actor | 1928 | 1 | |
| Sigurðarson, Jóhann | Jóhann Sigurðarson | Actor | 1991 | 2 | |
| Sigurðardóttir, Margrét | Margrét Sigurðardóttir (Margrét Sigurðardóttir) | Costume Designer | 1998 | 1 | |
| Sigurdsson, Thórhallur | Thórhallur Sigurdsson (Thórhallur Sigurdsson) | Director | 1999 | 5 | |
| Sigurdson, Kåre | Kåre Sigurdson | Actor | 1984 | 2 | |
| Sigurdson, Dag | Dag Sigurdson (Dag Sigurdson) | Lighting Designer | 1996 | 1 | |
| Sigurdardottir, Arna Rut | Arna Rut Sigurdardottir | Dancer | 2017 | 1 | |
| Sigurbjörnssyni, Lárusi | Lárusi Sigurbjörnssyni (Lárusi Sigurbjörnssyni) | Translator | 1952 | 1 | |
| Sigurbjörnsson, Jón | Jón Sigurbjörnsson | Actor | 1962 - 1976 | 3 | |
| Sigstad, Mari Vassdokken | Mari Vassdokken Sigstad (Mari Vassdokken Sigstad) | Actor | 2005 - 2007 | 6 | |
| Sigrist, Gundula | Gundula Sigrist | Costume Designer | 1973 | 1 | |
| Sigrist, Ernst C. | Ernst C. Sigrist | Actor | 1995 | 1 | |
| Sigrist, Andreas | Andreas Sigrist (Andreas Sigrist) | Actor | 2006 - 2011 | 4 | |
| Signoret, - | - Signoret (- Signoret) | Actor | 1903 - 1908 | 3 | |
| Sigmund, Su | Su Sigmund | Costume Designer | 2006 - 2007 | 3 | |
| Sigmund, Franjo | Franjo Sigmund | Mask Maker | 1952 | 1 | |
| Sigmond, Rita | Rita Sigmond | Actor | 2017 - 2019 | 9 | |
| Sigley, Glenys | Glenys Sigley | Actor | 1989 | 1 | |
| Sigley, Dan | Dan Sigley | Actor | 2005 | 1 | |
| Sigler, Amalie | Amalie Sigler (Amalie Sigler) | Actor | 1889 | 2 | |
| Sigl, Peter | Peter Sigl (Peter Sigl) | Actor, Director | 1893 - 1902 | 3 | |
| Sigl, Mr.. | Mr.. Sigl (Mr.. Sigl) | Actor | 1893 - 1900 | 2 | |
| Sigl, - | - Sigl (- Sigl) | Actor | 1889 | 1 | |
| Siggelkow, Bertha | Bertha Siggelkow (Bertha Siggelkow) | Actor | 1898 | 1 | |
| Sigg, Maximilian | Maximilian Sigg | Actor | 1971 - 1973 | 2 | |
| Sigg, Carola | Carola Sigg | Actor | 2009 | 1 | |
| Sigbjørnsen, Tor | Tor Sigbjørnsen (Tor Sigbjørnsen) | Actor | 1985 | 2 | |
| Sigaux, Henri | Henri Sigaux | Translator | 2007 - 2009 | 10 | |
| Sigaux, Gilbert | Gilbert Sigaux | Adaptation, Translator | 1962 - 1995 | 13 | |
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