Ian was born in Peru, and was raised in Spain, Trinidad and Scotland. He now lives in Hawaii with his wife and three sons.

Ian trained at the Royal Scottish Academy of Music and Drama. He received a special commendation at the 1995 Ian Charleson Awards for his performances in the title role in Torquato Tasso at the Edinburgh International Festival, and as Creon in Oedipus at the Citizens’ Theatre, Glasgow. In addition, Ian has worked on stage with the Royal National Theatre, Royal Shakespeare Company and Almeida Theatre, London.

Ian starred in numerous British TV shows, and in the TV movie in Richard II (1997), before joining the cast of the ABC TV series Lost. In 2006, he was nominated for an Emmy for his role as Desmond Hume in Lost, and continued as a series regular for 5 seasons.

Ian’s TV career has included a series regular role in ABC’s Scandal, and recurring roles on 24, Law & Order: Special Victims Unit, Fringe, The Mentalist and Body of Proof. He is currently a series regular, playing the role of Marcus Kane, on The CW’s The 100. In June, 2017, it was announced that Ian will portray the character of geneticist, Dr. Evan Declan in Marvel’s upcoming series, Inhumans.

On the big screen, Ian has appeared in 10.0 Earthquake (2014), Hitman (2007), and The Gospel of John (2003). His indie credits include the 2006 films Half Light with Demi Moore, and 9/Tenths with Gabrielle Anwar. Recently, Ian has played leading roles in The Girl on The Train (2013), Frank vs God (2014), Pali Road (2015), and Just Let Go (2015).

The short film dress, which Ian wrote, produced, directed, and starred in, won the award for Best Short at the Honolulu International Film Festival, and at the Peace on Earth Film Festival. Ian has also produced and starred in the short film Visible which reunited him with his Lost co-star Sonya Walger.

In 2016, Ian helmed the episode The Other Side of The CW network’s post-apocalyptic science fiction drama television series The 100.

Rememory (an American sci-fi drama film, starring Peter Dinklage, Julia Ormond and Anton Yelchin) is Ian’s most recent feature. It premiered at the 2017 Sundance Film Festival.