Despite his role in the first "Kingsman" movie, actor Colin Firth doesn't think he makes a "believable" action hero. The 56-year-old reveals he has no intention of making the transition into action films, despite having received some offers. He told Digital Spy that if he tried to go in as a badass on an earnest basis, he wouldn't be able to get away with it. Firth has starred in a variety of roles, but many of them romantic comedies and dramas. He recently admitted to The Hollywood Star that the original "Mama Mia" was one of his favorite movies ... despite the criticism it received upon its 2008 release. The sequel, "Mama Mia! Here We Go Again" is currently filming.