Jack Pratt, born John Harold Pratt, (1878–1938) was a Canadian film director and actor. He directed several films and acted in dozens more. As a director, his work included screen adaptations of novels.^[1]

Known as Smiling Jack, he married actress Betty Brice.^[2] She starred in the 1916 film Her Bleeding Heart he directed and was also in the film Gods of Fate.

He was hired by Lubin as a director in 1915.^[3] He served as President of the Lubin Benefit Association, associated with Lubin Manufacturing Company.^[4]

• The Little Pirate (1913)
• Shore Acres (1914)^[5]
• The Jungle (1914), one of the directors of an adaptation of Upton Sinclair's 1906 novel
• The Garden of Lies (1915)
• The Rights of Man: a Story of War's Red Blotch (1915)
• The Gods of Fate (1916)^[6]
• Her Bleeding Heart (1916)
• The Woman Untamed (1920)
• The Heart of a Woman (1920)
• Roman Candles (1920)

• Dan (1914), as Stonewall Jackson
• Ridin Thunder
• Bright Skies
• The Little Wanderer (1920) as Tully
• Hush (1921)
• Back to Yellow Jacket (1922) as William Carson
• The Lone Hand (1922), as Jack Maltrain
• The Western Wallop (1924), as Convict Leader
• The Iron Man (1924), a serial
• A Roaring Adventure (1925) as Brute Kilroy
• The Sign of the Cactus (1925), as Sheriff
• The Wild Horse Stampede (1925), as Henchman
• Ace of Spades (1925)
• Ridin' Thunder (1925)
• The Red Rider (1925)
• The House Without a Key (1926), a serial, as James Egan
• Hawk of the Hills (1927), a serial, as Colonel Jennings
• The Western Whirlwind (1927)
• Rough and Ready (1927) as Parson Smith
• Wild Beauty (1927) as Davis
• Heart Trouble (1928), as Army Captain Bob Reeves
• The Desert Song (1929), as Pasha
• Between Fighting Men (1932), as Sheriff Gorman