The British star will act as a coach alongside Naomi Campbell on the forthcoming Sky Living modelling competition.
Also joining the show, which will see wannabe models competing to become the face of a beauty brand, is Victoria's Secret model Caroline Winberg.
O'Connor said of the announcement: "I am thrilled to be joining the lineup of The Face. Naomi is a huge inspiration, so to be working with her on this project is an enormous privilege.
"Caroline is one of the modelling world's most exciting new talents so to have her expertise on board is also a huge bonus - I can't wait to get started."
Winberg added: "We're all looking for contestants who have the whole package. I'm excited to work with and develop my group of girls so that hopefully one will be crowned as the ultimate model."
The Face UK will launch on Sky Living later this year.
Caroline Winberg joined The Face UK