| First Name | Unnur |
| Middle Name | Birna |
| Last Name | Vilhjálmsdóttir |
| Full Name at Birth | Unnur Birna Vilhjálmsdóttir |
| Age | 27 |
| Date of Birth | May 25, 1984 |
| Birthplace | Reykjavík |
| Height | 5' 8" (173 cm) |
| Build | Average |
| Eye Color | Green |
| Hair Color | Black |
| Star Sign | Gemini |
| Religion | Christian |
| Ethnicity | White |
| Nationality | Icelander |
| High School | lawyeranthropologistlaw |
| University | University of Iceland |
| Occupation Category | Model |
| Claim to Fame | Miss Iceland 2005, Miss World 2005 |
| Official Website | profile.myspace.comunnurbirna.blog.isunnurbirna.comwhosdatedwho.compowerset.com |
Unnur Birna Vilhjálmsdóttir (born May 25, 1984 in Reykjavík, Iceland) is a former winner of the Miss Iceland pageant. She was crowned Miss World 2005 on December 10, 2005 in the Beauty Crown Theatre located in the Chinese beach city of Sanya, by the reigning beauty queen, 2004's Miss Peru Maju Mantilla.