| Act. 4 Cait Sith | ||||
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| Single album by | ||||
| Released | February 1, 2018 | |||
| Recorded | 2017–2018 | |||
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| Length | 14:19 | |||
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| Gugudan chronology | ||||
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| Singles from Act. 4 Cait Sith | ||||
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Act. 4 Cait Sith is the second single album by South Korean girl group Gugudan. It was released on February 1, 2018, by Jellyfish Entertainment and distributed by CJ E&M. This marks the last release to feature member Hyeyeon.