Jenna-louise Coleman's 'Doctor Who' character has been revealed.

The 26-year-old actress has been spotted filming scenes for the BBC One sci-fi show's Christmas special episode in which she is expected to make her debut as the Time Lord's new sidekick Clara after replacing Scottish actress Karen Gillan.

The brunette beauty was seen filming on location in Newport, Wales, dressed in typical Victorian attire, while off-camera she sported a big black jacket to keep warm and chatted to fellow cast members as she practiced her lines.

As well as Jenna, 'Life of Mars' actress Liz White and 'Silent Witness' star Tom Ward were both on set, as was 'Stella' actress Catrin Stewart, who is reprising her role as Jenny in the seventh series of 'Doctor Who'.

Jenna is best known for her roles in ITV1 soap 'Emmerdale' as Jasmine Thomas and she also portrayed rebellious schoolgirl Lindsay James in BBC One drama series 'Waterloo Road'.