Plot: He's the stuttering King of England, Meryl Streep's singing boyfriend in "Mamma Mia" and Bridget Jones' main squeeze. COLIN FIRTH is as versatile as he is charming, and last year he showed up the day after winning his Oscar to show it to Ellen in person! Today, he's here to tell Ellen about his role in the thrilling remake of the classic film, "Tinker Tailor Soldier Spy