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ORLANDO, Fla. — SeaWorld is getting into the Halloween spirit this Friday the 13th.

​​The Orlando-based company has launched a flash sale on tickets to its Howl-O-Scream events, which return to SeaWorld Orlando and Busch Gardens Tampa Bay in September.

The deal, which expires at 11:59 p.m. Friday, includes two single-night Howl-O-Scream tickets for $66.66. To receive the discount, two tickets must be purchased together.

Busch Gardens is offering the same deal.

Both theme parks offer single-night tickets that start at $34.99 each if purchased in advance.

Howl-O-Scream is an after-hours, separately-ticketed event featuring haunted houses, scare zones and live entertainment. It will run select nights Sept. 9 through Oct. 31.

It returns to SeaWorld Orlando for a second year, and the park is promising the event will be “bigger than ever before.” Ahead of this year’s event, SeaWorld released a teaser video showing a creature using blood to write on a wall.

So far SeaWorld has not announced details on any of the haunted houses for this year’s Howl-O-Scream Orlando or Howl-O-Scream Busch Gardens.