| Age | 53 |
| Birthday | 4 June, 1971 |
| Birthplace | London, England |
| Height | 5' 8" (173 cm) |
| Eye Color | Brown - Dark |
| Hair Color | Brown - Dark |
| Zodiac Sign | Gemini |
| Nationality | English |
| Occupation | Actor |
| Claim to Fame | Tom is Bridget Jones's Diary, The Voice of Alucard in the Netflix series 'Castlevania.' |
James Nicholas Callis (born 4 June 1971) is an English actor. He is known for playing Dr. Gaius Baltar in the re-imagined Battlestar Galactica miniseries and television series, and Bridget Jones's best friend Tom in Bridget Jones's Diary, Bridget Jones: The Edge of Reason, and Bridget Jones's Baby. He joined the cast of the TV series Eureka, on Syfy, in 2010, and since 2017, he has voiced the character Alucard in the Netflix series Castlevania and Castlevania: Nocturne, based on the video game series of the same name. In 2022, he appeared in Season 2 of Star Trek: Picard as Jean-Luc's father in childhood flashbacks.
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