This study evaluated the effectiveness of 2 versions of an 8-session forgiveness group intervention for divorced individuals. Participants (randomized, n=192; analyzed, n=149) were randomly assigned to a secular forgiveness condition, a religious forgiveness condition, or a no-intervention comparison condition. Measures of forgiveness and mental health were obtained at pretest, posttest, and 6-week follow-up. Participants in both intervention conditions increased significantly more than comparison participants on self-reported forgiveness of an ex-spouse and understanding of forgiveness. Participants in the secular condition showed a greater decrease in depressive symptoms than comparison participants. Intrinsic religiousness did not moderate intervention effects.