Ahead of the May 24 season 1 finale, Freeform has picked up a second season of its hit mermaid thriller Siren. The network ordered a 16-episode Season 2, up from 10 episodes this season. The renewal was announced just ahead of the network’s upfront presentation today in New York City.

Siren has been a ratings success for Freeform, debuting as the No. 1 new cable drama with young women 18-34 and 12-34.

Co-created by Eric Wald and Dean White, Siren is an epic tale about the coastal town of Bristol Cove, known for its legend of once being home to mermaids. The arrival of a mysterious girl, Ryn (Eline Powell), wreaks havoc on the small fishing town as she proves the folklore true. Using their resources, marine biologists Ben (Alex Roe) and Maddie (Fola Evans-Akingbola) must work together to find out who and what drove this primal hunter of the deep sea to land and if there are more like her. Xander (Ian Verdun) is a deep-sea fisherman looking to uncover the truth and Helen (Rena Owen), the town eccentric, knows more than she lets on.

Wald and White executive produce, along with showrunner and executive producer Emily Whitesell. Brad Luff, Nate Hopper and RD Robb are also attached as executive producers.

The recently rebranded network also touted its diverse behind-the-scenes roster, noting that half of its episodic directors are female, diverse, or LGBTQ, 60% of series writers are female or diverse, and every original series on the network has a female producer.

In other news, Freeform announced it will air over 1000 hours of themed holiday programming this season, kicking off with an expanded 31 Nights of Halloween on Oct. 1, (up from 13 Nights of Halloween last season). The network also introduced Freeform Santa with Shadowhunters Isaiah Mustafa and November’s Kick Off to Christmas. The network’s popular 25 Days of Christmas returns to the entire Disney|ABC Television on December 1. During last year’s 25 Days of Christmas, Freeform says it led the television group with 80MM unique viewers for the programming, accounting for more than half of the 151MM total unique viewers across all channels.