In the clip, Colbert admits to Matafeo that, as she is a New Zealander he "legally had to ask" if she was a Lord of the Rings fan.
The Horndog star gave a sheepish grin in response, replying "I hoped you would ask", admitting to being a big fan of the fantasy book and film series.
Dubbing herself a "nerd" Matafeo then put her foot in it a little when she dubbed Colbert even more of a nerd. As she tried to backpedal while the crowd laughed, Colbert admitted to wearing his nerd "crown" with pride.
Matafeo went on to admit how far she had gone with her LOTR love admitting to taping her ears to look like an elf, which resulted in her having to cut her hair to remove the sticky mess.
The award-winning writer and comedian seemed completely relaxed as she continued to discuss her LOTR "obsession", sharing a charming anecdote involving a contract and a packet of potato chips.
Starstruck season two has started streaming on TVNZ on Demand. The second series will continue to explore the hilariously complicated love story between Rose's character, Jessie and her famous beau, Tom, played by Nikesh Patel.