"After every Tuesday night [when the show screens in Australia] I wake up on Wednesday morning with around 50 new Instagram followers.
"I'm pretty chuffed that people want to get to know me."
A second series of 800 Words, which was shot on Auckland's west coast, has been commissioned.
"I always think of certain milestones as though I'm receiving a badge and I just achieved my 'second-season' badge," Tarrant said.
The actor also has a major part in TV2's upcoming glam soap Filthy Rich.
His role as a player in the vacuous world of Auckland high society is a world away from the laid-back beach vibe of 800 Words.