A Hong Kong man may have proven himself as Scarlett Johansson’s biggest fan, after spending tens of thousands of dollars and more than a year of his life building a talking robot model that looks like the actress.

Ricky Ma, 42, invested more than AU$68,000 in the female humanoid robot, The Mirror reported.

The robot’s facial features are based on Johansson’s, but Mr Ma would not confirm the exact Hollywood star it was modelled on.

It responds to programmed verbal commands and has been designed with moving facial expressions, including a slow wink.

"When I was a child, I liked robots. Why? Because I liked watching animation,” Mr Ma told The Mirror.

“All children loved it. There were Transformers, cartoons about robots fighting each other and games about robots. After I grew up, I wanted to make one.”