Kristin Scott Thomas talks with PEOPLE about reuniting with her onscreen daughter from 'The Horse Whisperer,' Scarlett Johansson, for her moving directorial debut, 'My Mother's Wedding,' in which they play a mother-daughter duo for a second time.

Thomas co-wrote the script with her husband, journalist John Micklethwait, which includes a particularly poignant monologue for her character telling her daughters, essentially, to grow up and move on — a mature and worthy statement that might come a bit too late. “My Mother’s Wedding” feels only partially realized.

A dysfunctional family gathering for a special occasion (be it a wedding or a funeral) has long served as a ripe dramatic backdrop for a reason. What better excuse to bring together a motley crew of characters who know exactly how best to push one another's buttons and dredge up long-simmering resentments in the process?