Gail is a 61-year-old assistant headmistress at a school in Baltimore who suddenly faces forced early retirement. Accused of lacking tact by her employer, she is highly critical internally but views herself as polite since she keeps her judgments quiet. She lives alone in a small house, prefers her independence, and struggles with the physical and social realities of aging as her daughter prepares to marry.

Debbie is the 33-year-old daughter of Gail and Max. She is preparing for her wedding to Kenneth and values a peaceful, forgiving approach to connections, directly contrasting with her mother's tendency to hold grudges. She manages the friction between her modest family background and her future in-laws' affluence with relative ease.

Max is Gail's ex-husband and a passionate educator who works with at-risk youth in Baltimore. He is deeply empathetic toward both people and animals, though his habit of ignoring personal boundaries frequently frustrates his ex-wife. Despite their divorce, he maintains an easy camaraderie with Gail and actively tries to support his family through times of crisis.

Kenneth is Debbie's fiancé, hailing from an affluent and highly stylish family. He becomes the center of a pre-wedding controversy when rumors surface about his behavior at a recent party. His actions force his future in-laws to evaluate their own capacity for trust and forgiveness just days before the ceremony.

Joyce is Gail's mother, a widow who transitioned to a high-rise condo after her husband's passing. She possesses a lively, somewhat acerbic personality and actively enjoys gossiping about other guests. As she ages, her growing physical frailty forces her daughter to gradually assume a primary caretaking role.

Sophie is Kenneth's mother. She is a highly stylish, affluent woman who sponsors a day of beauty for the bridal party. She gradually takes over much of the wedding planning, pushing for a more opulent affair than originally intended and causing Gail to feel out of place during the festivities.

Rupert is Kenneth's father. Along with his wife Sophie, he belongs to an opulent country club where the wedding reception is held. He helps foot the bill for the increasingly lavish wedding festivities, accommodating his family's expensive tastes without complaint.

Elizabeth is Kenneth's sister. She creates significant turmoil just before the wedding by informing Debbie of a rumor regarding Kenneth's fidelity at a recent party. Her motivations remain ambiguous, hovering between genuine concern for the bride and petty sibling rivalry.

Andrew is a former admissions counselor at the school where Gail once taught math. He is a neat, orderly, and solitary man whose quiet life strongly contrasted with the domestic chaos of Gail's early marriage. His memory forces Gail to reflect on her past choices and her fundamental need for connection.

Marilee is the headmistress of the Baltimore school where Gail works as an assistant. She maintains a formal, somewhat distant relationship with her staff. Approaching retirement and facing a minor cardiovascular procedure, she shocks Gail by announcing she will hire an outside replacement rather than promoting from within.

Jared is Kenneth's uncle and the designated best man for the wedding ceremony. He is also a figure from Gail's distant past, having dated her briefly before she met Max. He appears highly successful and is currently divorced, bringing an unexpected layer of nostalgia to the family gathering.

Celine is a foster cat that Max rescues just before the wedding weekend. Because Kenneth is highly allergic to felines, the cat ends up staying at Gail's house, initially serving as a major point of contention before gradually warming up the quiet home.