Career: Tennant's TV debut was in a 1993 episode of Rab C Nesbitt, but he first made people sit up and take notice thanks to an acclaimed performance in Takin' Over the Asylum a year later. His first film was 1996's Jude. He then appeared in the likes of Duck Patrol, Love in the 21st Century, Bright Young Things and He Knew He Was Right. In 2004, musical mini-series Blackpool helped raise his profile, while Casanova turned him into a heart-throb. Tennant replaced Christopher Eccleston in Doctor Who in 2005, but left the role at the start of 2010; he did, however, return for the 50th anniversary episode in 2013. Projects since include Single Father, Fright Night and Broadchurch - he is also the star of the US version, Gracepoint. He continues to appear on stage whenever possible.

Career: Following a spell on stage, Bonneville made his TV debut in teen sitcom Dodgem. He spent the next few years dividing his time between theatre, TV and film work, having small parts in such projects as The Memoirs of Sherlock Holmes, Cadfael, Mary Shelley's Frankenstein, Tomorrow Never Dies, Bugs, and Mosley. He had a regular role in sitcom Holding the Baby, but finally became a recognisable face thanks to the movie Notting Hill in 1999. Since then he's appeared in The Cazalets, Madame Bovary, The Gathering Storm, Tipping the Velvet, Doctor Zhivago, Twenty Twelve, and Love Again. He won rave reviews for his role in the TV comedy Freezing and Filth: The Mary Whitehouse Story. However, he's become a TV superstar on both sides of the Atlantic in recent years thanks to his starring role in period drama Downton Abbey. Recent projects have included W1A and The Monuments Men.

Career: Blood went on to star in Sky1 sitcom Trollied, E4 drama Misfits, BBC3 sitcom Him & Her and ITV mystery drama The Bletchley Circle. More recently, he appeared in the Channel 4 drama Babylon. His stage credits include playing Stuart Sutcliffe in Backbeat.