Marlowe Gardiner-Heslin is a Canadian actor known primarily for voice work in anime and children's animation. Born on March 30, 1985, in Toronto, Ontario, Canada, his career includes significant contributions to English-language dubs of popular Japanese series during the early 2000s.

Gardiner-Heslin is best recognized as the English voice of Tyson Granger, the main protagonist of the Beyblade anime franchise. He voiced this character across multiple installments, including the original Beyblade series, Beyblade: V-Force, and Beyblade G Revolution, as well as the theatrical film Beyblade the Movie: Fierce Battle. The character of Tyson Granger is the leader of the Bladebreakers and the master of the sacred bit-beast Dragoon.

Beyond the Beyblade franchise, Gardiner-Heslin took on the role of He in the original video animation (OVA) anime series Interlude. The OVA, which follows an unnamed protagonist navigating a mysterious and dreamlike world, featured Gardiner-Heslin as the English voice of the main character. He also contributed his voice to the animated series Marvin the Tap-Dancing Horse as the character Eddy Largo.

In addition to his on-screen voice work, Gardiner-Heslin has been involved in theatre, performing in plays such as Muscle Memory.