Dean Haglund is probably best known for his nine seasons playing Langly, one of the computer geeks known as "The Lone Gunmen" from the hit FOX TV series The X-Files. He also starred in the The X-Files spin-off series The Lone Gunmen. His character is so popular that Dean is a main attraction at X-File and Sci-Fi conventions all over North America.

A long-time comedy improviser, Dean got his start with the likes of Ryan Stiles and Colin Mockerie (Whose Line is it Anyway?) in the internationally award winning Vancouver TheatreSports League.