Kit Guard was born Christen Klitgaard on May 5, 1894, in Hals, Denmark, to Jens and Thyra Klitgaard, who were farmers, and he had four brothers. The family immigrated to Canada in 1901 and later relocated to San Francisco, California. He eventually became an American citizen and moved to New York City, where he worked as a blacksmith.
During World War I, Kit joined the Army and served overseas as a member of a military police unit. Following the war, he moved to Hollywood and was signed by F.B.O. Pictures. He went on to star in over one hundred silent short films, including the popular Telephone Girl series alongside Alberta Vaiughn and the Beauty Parlor series with Lorraine Eason.
Kit frequently costarred with Al Cooke, and they became a well-known onscreen comedy duo. On August 1, 1924, he married 24-year-old Nell Griffith Sullivan. However, she filed for divorce in 1928, citing his violent and drunken behavior.
By the 1930s, Kit was appearing in low-budget B-movies. He had small roles in several Three Stooges shorts and was featured in numerous Westerns, including The Fighting Champ and El Diablo Rides alongside Bob Steele. Tragically, his second wife passed away.
Kit married his third wife, Hazel Bowers, and continued to act until the late 1950s. He had uncredited roles on the TV shows Gunsmoke and Have Gun Will Travel. Kit ultimately succumbed to stomach cancer on July 18, 1961, and was laid to rest at Valhalla Memorial Park in North Hollywood.