| Tatjana Sais | |
| Birth Date: | 28 January 1910 |
| Birth Place: | Frankfurt, German Empire |
| Death Place: | West Berlin, West Germany |
| Resting Place: | Luisenfriedhof III |
| Occupation: | Actress |
| Yearsactive: | 1937–1967 |
| Spouse: | Günter Neumann (?–?) |
Tatjana Sais, Lady Greene (28 January 1910 - 26 February 1981) was a German film actress. She appeared in 20 films between 1937 and 1967 and was a member of the jury at the 1st Berlin International Film Festival.[1] She was married to Günter Neumann and later to Sir Hugh Greene.