The Unicorn () is a fictional 17th-century three-masted armed Royal Navy vessel appearing in The Adventures of Tintin, the comics series by Belgian cartoonist Hergé. The ship plays a leading role in both The Secret of the Unicorn and Red Rackham's Treasure, published in 1943 and 1944, respectively. The Unicorn also appears in the 2011 film adaptation The Adventures of Tintin: The Secret of the Unicorn.