Syd Heylen (25 May 1922 - 4 December 1996) was an Australian character actor of radio, stage, television and film, comedian, and variety performer and soldier, he often performed in a traditional vaudeville style in the vein of Roy Rene.

Heylen was best known for his role in A Country Practice, as the RSL club manager, barman and chef Vernon 'Cookie' Locke, who he played from 1982 until 1992. After he left A Country Practice in 1992, he and his wife Patti retired to their Gold Coast, Queensland home. Occasionally he would do public appearances and performances.