The sneak peek into the new Freeform show also came with an official premiere date: March 29, 2018.
Freeform has picked up 10 more episodes of 'Shadowhunters.' Plus, the star of 'Hamilton' joins the cast!
Siren takes place in Bristol Cove, a coastal town known for its legend of once being home to mermaids. These characters come together when the arrival of a mysterious girl proves this folklore too true, with the battle between man and sea taking a very vicious turn as these predatory beings return to reclaim their right to the oceans.
The series stars Eline Powell, Alex Roe, Fola Evans-Akingbola, Ian Verdun, and Rena Owen.
Check out the trailer below for more of a look into the world of Bristol Cove:
Siren, Series Premiere, March 29, 2018, Freeform