George Clooney to appear in 'Downton Abbey' film

Hollywood superstar George Clooney has agreed to be a part of a short 'Downton Abbey' related film.

The film will release on UK's network ITV and is a part of ITV's annual Text Santa campaign that raises money for six UK charities.

Clooney's role in the film has not yet been revealed.

The series' fifth season premieres later this month.