Few details about the actor's death were available as WENN went to press, but the news was announced on his official website on Tuesday (05Feb13) - his 62nd birthday.
A post reads, "It is with great regret that we, at Robin's official fansite, have to announce his sudden and unexpected passing. He was an amazing and wonderful man and we are all heartbroken. Please raise a glass and toast to the life and career of the wonderful Robin Sachs."
The British star, who was born in London, is perhaps best known for playing villainous character Ethan Rayne on the hit U.S. TV series. He also appeared in The Lost World: Jurassic Park and Tim Allen's Galaxy Guest, as well as science fiction shows Babylon 5, Star Trek: Voyager and Torchwood: Miracle Day.
Sachs additionally provided voices for several video games, including Resident Evil: Damnation and Mass Effect 2.