Robertson spent much of his younger life abroad, living in such places as Singapore, Cyprus and The Netherlands, with his family following his RAF fighter pilot father. He was sent back to England at the age of eight, to get an education, and was a boarder at prestigious Marlborough College. After leaving he attended the Oxford School of Business, where he gained a degree in business and management, before starting a career in marketing.
After a few years, although successful in his career, Robertson felt unfulfilled and decided to quit his job and enroll in drama school. After attending a one-year course at London drama school Arts Educational, he launched his professional acting career playing the lead role of Alan Turing, the gay mathematician, in the play Breaking the Code. He appeared in many well-received stage plays and made several TV appearances over the next few years, before, in 1996, deciding to try his luck in Hollywood. By the end of the three week vacation he took there to investigate moving permanently, he had landed the lead role of Ben Evans in Aaron Spelling's new daytime drama Sunset Beach. Robertson played the brooding mysterious Brit for three years, also appearing as his character's evil identical twin, Derek, a role for which he won much critical acclaim.
After the cancellation of the show in December 1999, Robertson moved into behind the camera work, building a successful career as a writer and producer. He made his return to TV in 2003, playing interplanetary bounty hunter Travis Montana in one season of the Canadian sci-fi series Starhunter. He also appeared in the soap General Hospital in a recurring role, and worked alongside Julia Roberts, lending his voice to the animated movie The Ant Bully. He has also acted in several computer games, and played the lead role in the game Darkstar, which included a lot of live-action footage of Robertson.
Robertson stars as Theodore Crawford in the MyNetworkTV telenovela, Wicked Wicked Games, which premiered on December 6, 2006, and will next be seen starring in the movie Crazy Girls Undercover.
Robertson was married to Australian actress/writer Libby Purvis, whom he met at drama school. The pair moved to America together for him to take the role on Sunset Beach, and married in 1999 on Richard Branson's private island, Necker Island. They split up in 2003 and divorced the following year. They have two children, born October 2002, Alexander and Amelia, who live with their mother in her native Australia. In September 2007 Robertson married his second wife, Caryn, in Venice, Italy. The couple live in Los Angeles.
Robertson works designing and building houses when he is not acting.
