Guest Stars Mindy Kaling as Kelly Kapoor B.J. Novak as Ryan Howard Robert R. Shafer as Bob Vance Mark Proksch as Nate Michael Schur as Mose Ameenah Kaplan as Val Nancy Carell as Carol Stills Sendhil Ramamurthy as Ravi Rachael Harris as Rachael Ed Begley Jr. as Erin's Biological Father Dakota Johnson as Dakota Joan Cusack as Erin's Biological Mother John Gemberling as Caterer Greeting Guests Jennifer Celotta as Wedding Guest Jay Falk as Halpert's Home Purchaser Allison Jones as Woman Guarding PBS Swag at Warehouse Uncredited Steve Carell as Michael Scott