Appendage is a 2023 American horror drama film written and directed by Anna Zlokovic and starring Hadley Robinson.

[3] Hannah sits at a table with her parents when suddenly she feels a sharp pain in her side, and a bulge begins to appear.

The next morning, Hannah sees a stressful message on her phone, which causes the pain in her side to momentarily return.

At work, Hannah and her best friend noticed she bled on the cuff of her newly created dress, and her boss reprimanded her for it.

Hannah goes to a dermatologist, who says the "skin irritation" occurred on her birthmark and could have been caused by dual DNA from absorbing a twin while still inside her mother's womb.

One night, Hannah recounts to Claudia that she once drove her car into a median in high school and ruined one of her parents' rich parties.

When Hannah returns home, she listens to the monster, who states that Kaelin isn't cheating yet but is falling in love with Esther.

After emerging victorious in the fight, the real Hannah makes amends with her parents and keeps the now shrunken, baby-sized appendage in a crib in the attic.

[8] Nick Allen of RogerEbert.com awarded the film three out of four stars, writing "Zlokovic's tone confidently moves between sincere emotional beats and horror-comedy, her story's expanding scope taking after 80s directors like John Carpenter and Larry Cohen".

[10] Dennis Harvey of Variety gave the film a negative review and wrote, "But despite the grotesque premise, its attack is a little too blunt to make much impact, whether taken as thinly-veiled satire or straight fantasy thriller.