This is a difficult question to answer with any certainty, as it largely depends on Chris Hemsworth's personal preferences and career goals. However, it seems unlikely that he will retire from acting after Love and Thunder, as he still has plenty of good roles left in him. Additionally, Love and Thunder is not his last movie contractually- he still has at least one more Thor movie left to film. So unless Hemsworth decides to quit acting altogether or retires from playing Thor specifically, it seems safe to say that he is not done after Love and Thunder.