Rachel Sennott was misnamed as she walked the red carpet at the Oscars on Sunday ... Sennott stunned in a sparkly pink ...

reposting Sennott’s photo with a “Rachel Anne [handshake emoji] Rachel Anne” caption, playing off the fact that both actresses share not only first but also a middle name.

Sennott shared her reaction on Instagram Stories to the moment when the pre-show misidentified footage of her on the red carpet as a completely different Rachel, The Hunger Games and West Side Story ...