1 The Little Mermaid is the debut extended play by South Korean girl group Gugudan.

On June 13, 2016, Jellyfish Entertainment launched the band's official website and announced via SNS that the group would debut with the mini-album Act.

The EP was released on June 28, 2016 on Melon and various sites in South Korea and on iTunes for the global market as a digital download.

[1][2] The music video for the title track "Wonderland", was released on June 28, 2016 in conjunction with the EP and accumulates over 2 million views.

On June 29, the group made their official debut on MBC Music's Show Champion performing "Good Boy" and "Wonderland".