Boyle, 51, who found fame as a contestant on 'Britain's Got Talent' in 2009, is currently shooting 'The Christmas Candle', reported Daily Star.
The singer says she is having a blast on set because she gets to dress in costume.
"Everyone on set is a delight to work with and it's a fantastic experience to be part of the team. I'm really enjoying getting dressed in the period costumes and stepping back in time," a statement read.
But Barks, who performed with the cast of 'Les Miserables' at the Oscars, said she is struggling to keep up with the hectic shooting schedule.