One Of Us Is Lying cast says secrets unite disparate characters. Cast members of One of Us Is Lying, premiering Thursday on Peacock, said their characters secrets bond them together. Annalisa Cochrane, Barrett Carnahan, Chibuike Uche, Jessica McLeod, Melissa Collazo, Marianly Tejada and Cooper van Grootel play high school students questioned in the death of another student (Mark McKenna).