| First Name | Jack |
| Middle Name | John |
| Last Name | Buchanan |
| Full Name at Birth | Walter John "Jack" Buchanan |
| Age | 66 (age at death) |
| Date of Birth | April 2, 1891 |
| Birthplace | Helensburgh, Scotland, UK |
| Date of Death | October 20, 1957 |
| Location of Death | London, England, UK |
| Cause of Death | spinal cancer |
| Height | 6' 2" (188 cm) |
| Build | Slim |
| Star Sign | Aries |
| Nationality | Scottish |
| Occupation Category | Actor |
| Claim to Fame | The Band Wagon (1953) |
Walter John "Jack" Buchanan (2 April 1891 – 20 October 1957) was a British theatre and film actor, singer, producer and director. He was known for three decades as the embodiment of the debonair man-about-town in the tradition of George Grossmith Jr., and was described by The Times as "the last of the knuts." He is best known in America for his role in the classic Hollywood musical The Band Wagon in 1953.
Selected Jack Buchanan film and TV show credits: