Background and career
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, Bridget Jones' best friend Tom in the Bridget Jones film series and Claude Whelan in the Apple TV spy series Slow Horses. He appeared in the television series Eureka and 12 Monkeys on Syfy as Dr. Trevor Grant and Athan Cole "The Witness", respectively. 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.
Callis was born in Hampstead and brought up in London, where he attended St. Martin's Prep School in Northwood and then Harrow School in north-west London. His parents owned a bed-and-breakfast. He is of Jewish descent, and his ancestors originate from Russia, Poland, and Ukraine. Callis attended the University of York, graduating in 1993 with a BA in English and Related Literature. He was a member of Derwent College, for which he was an enthusiastic rugby player. At university he was also a keen student actor, director and writer. He was a key member of the University of York Gilbert and Sullivan society and appeared in productions put on by friends at Cambridge University, including a production of Harold Pinter's The Dumb Waiter.
Callis went on to attend the London Academy of Music and Dramatic Art, from which he graduated in 1996. In the same year, he was awarded the Jack Tinker Award (Theatre Record Critic of the Year) for Most Promising Newcomer for his performance in Old Wicked Songs, a two-hander by Jon Marans, in which he starred alongside Bob Hoskins. Callis has appeared in various West End productions and television series as well as on radio. He has also been involved in writing and directing. His directorial debut was Beginner's Luck, a co-production of his and writer/director Nick Cohen's Late Night Pictures and Angel Eye Film & TV, starring Julie Delpy, Steven Berkoff and Fenella Fielding. Beginner's Luck was critically panned, but ran for almost three weeks on one print (all the low-budget film could afford) in one cinema in central London, then went on a tour of student cinemas around the UK. Callis finished filming his first role in a cinema film, Bridget Jones's Diary, alongside Renée Zellweger and Hugh Grant, in the summer of 2000 and between a few further film and TV roles went back on stage in the Soho Theatre in December 2002. In 2003, Callis played the role of Dr. Gaius Baltar in the re-imagined Battlestar Galactica miniseries and continued the role in the regular series that followed. In 2006, Callis won the Best Supporting Actor Saturn Award and an AFI award for his performance as Baltar.
Sources
Net-worth figure: Celebrity Net Worth (October 2026), in USD. Biography and career facts: the person's Wikipedia article and linked reporting. Snapshot date for all StarWorth figures: 28 October 2026.
