HBO Max is rounding out cast for its comedy pilot OK Boomer. Will Sasso (United We Fall, Mom) and Tim Chiou (I Was a Simple Man, Seal Team) are set as series regulars, along with Zoe Manarel (New Amsterdam, An American Girl: Summer Camp) and Carter Chee in the multi-camera comedy pilot from creator Todd Linden (Happy Endings, Alexa & Katie), the late Jamie Tarses’ Fanfare and Sony Pictures TV. They join previously announced series regulars Patti Lupone, Erinn Hayes and Devere Rogers.