PurposeThe purpose of this study was to theorize and examine a Pygmalion perspective in how leader and coworker expectations predict in-role and ex-role employee green behavior (EGB).Design/methodology/approachUsing a time-lagged field study, data were collected from a sample of 71 leaders and 340 members to examine the hypothesized relationships with a multilevel model (group level and individual level).FindingsThe results showed that leader green behavior and self-efficacy for EGB (i.e. the Pygmalion process) mediate the relationship between leader expectations and EGB, while self-efficacy mediates the relationship between coworker expectations and EGB. In addition, this study found that the effect of coworker expectations and EGB via self-efficacy is stronger when leaders themselves demonstrate a higher level of green behavior.Originality/valueThis study also aims to provide a multilevel theory and investigates the interplay between multilevel variables in encouraging EGB. It also extends previous EGB literature through investigating a different process (i.e. the Pygmalion process) relating leader expectations for EGB to EGB. Moreover, this study develops implications of Pygmalion process on EGB from theoretical and practical perspectives.