IFC Films has unleashed the first official trailer for its controversial mad-doctor film The Human Centipede: First  Sequence, available OnDemand on April 28 and in limited theatrical release beginning April 30.

Directed by Dutch filmmaker Tom Six, Centipede stars newbie actresses Ashlynn Yennie and Ashley C. Williams as American tourists abducted by an evil German scientist hell-bent on creating a human centipede by sewing people together mouth-to-anus.

(To read a review, go here)

The film costars Akihiro Kitamura, Dieter Laser, and Andreas Leupold and has already won awards on the film festival circuit, including Best Picture at the 2009 Scream Fest LA Film Festival and Best Horror Film at the 2009 Fantastic Fest. Six is currently working on a sequel, which will feature a 15 person human centipede.

Says star Ashlynn Yennie:

It was a little uncomfortable. …I think the most uncomfortable part was being down on all fours with your mouth … your jaw hurts mostly, because your mouth was open on a bit. But it wasn’t that bad, I’ll be honest. It wasn’t that bad to be on all fours.

Normally when we told people they were going to sew people together they thought it was going to be shoulder to shoulder, but we’re like “No … ass-to-mouth … it’s great.”

To see an interview and scene with Yennie click here.