Julia is a 49-year-old mother who recently stopped chemotherapy for terminal pancreatic cancer. She travels to Paris on a surprise trip organized by her daughter, hiding the full severity of her prognosis to maintain a cheerful facade. Haunted by the unfulfilled ambitions of her youth, she uses the vacation to reflect on past choices and create lasting memories for her child. Her return to the city stirs a desire to experience the joy and romance she missed in her cautious adult life.

Jackson is a 55-year-old, highly successful rock musician who built his fame on a hit cover song titled "City of Light." Despite his celebrity status and sold-out arena shows, he harbors deep insecurities about his songwriting abilities. Feeling isolated by his fame, he often seeks quiet moments in small dive bars where he can shed his public persona and engage in genuine conversations with everyday people.

Henry is a 99-year-old songwriter and World War II veteran who served as a B-17 gunner. After learning that the woman he loved and presumed dead for eighty years is alive in a Parisian care home, he immediately flies across the Atlantic. He has spent his entire career writing music dedicated to her memory. Cysts on his vocal cords prevent him from singing, but he remains determined to use his famous song "City of Light" to reach her through her cognitive decline.

Celeste is an elderly resident at a Parisian memory-care facility, suffering from advanced dementia. During World War II, she was a brave, principled teenager working with the French Resistance, where she helped shelter an American airman. In the present day, her memories are heavily fragmented, and she frequently experiences confusion regarding her surroundings and the passage of time.

Shelby is a recently divorced woman visiting France with two energetic friends. She carries deep emotional wounds from her separation, which occurred after three unsuccessful rounds of IVF and her ex-husband's subsequent departure. Feeling isolated from her friends' celebratory drinking, she searches for a space to process her grief and rediscover her identity outside of her failed marriage.

Russ is a 45-year-old Australian expatriate who co-owns Le Maison Grog, a popular anglophone pub. He feels increasingly stagnant in his repetitive daily routine of serving drinks to tourists and cleaning up late at night. Seeking a more meaningful existence beyond the bar's superficial atmosphere, he takes an immediate interest in a sad, quiet American patron who visits his establishment.

George is an American Vietnam War veteran visiting Paris on a specialized historical tour. Since defending a fellow soldier from racist remarks in 1969, he has maintained a fifty-year friendship that defines much of his life. A widower who built a conventional family structure back home, he uses the European trip to reflect on the historical events that shaped his youth and the private truths he has kept hidden for decades.

Lou is a Black Vietnam War veteran touring historical sites in France, including the hotel where the Paris Peace Accords were signed. He is a widower who has spent over five decades leaning on his closest friend from the military. He views the rainy Parisian streets through a cinematic lens, recognizing the romantic atmosphere of the city while quietly harboring long-standing feelings.

Piper is a 23-year-old woman who has put her own romantic and professional life on hold to care for her ailing mother. She plans the weeklong French vacation as a grand surprise, organizing tickets for a concert she mistakenly believes features her mother's favorite artist. Exploring bookstores and cafes, she struggles to balance her anticipatory grief with her mother's insistence that she embrace her youth.

Kayla is a young American care worker employed at a Parisian assisted-living facility. She relocated to France hoping to forge a connection with her estranged French father, but faces coldness and xenophobic rejection from him instead. Feeling adrift in a foreign country, she searches for a sense of belonging and validates her presence through her compassionate work with dementia patients.

Melanie is a Parisian woman whose seemingly stable two-decade marriage shatters when she intercepts a text message confirming her husband's infidelity. She hosts her visiting grandfather while trying to process her betrayal. Torn between maintaining her comfortable life and demanding the respect she deserves, she closely observes the romantic decisions made by other women around her.

Nicolas is a kind, perceptive waiter working in central Paris. The son of a deceased American father, he practices his English by reading classic American poetry, particularly Walt Whitman. He uses his knowledge of the city's hidden parks and historical markers to offer comfort and distraction to tourists, displaying high emotional intelligence.

Nadim is a local street artist who paints near the Seine. Observant and gentle, he studies the crowds passing by his easel and seeks to capture authentic emotion on canvas. He carries a deep pride in his family's history—specifically his great-grandfather's efforts to forge documents for refugees during World War II—and uses these stories to comfort those who feel unwelcome in the city.

Gilles is Melanie's husband of twenty years. Entitled and conflict-avoidant, he initially attempts to deny his extramarital affair before relying on grand, performative gestures—such as sending two hundred and forty red roses—to smooth over the marital damage. He views his marriage as a comfortable arrangement that he expects to maintain without addressing the underlying breach of trust.

Brandon is Shelby's ex-husband, who abandoned their marriage after years of blaming her for their inability to conceive a child. He abruptly flies to Paris after his subsequent relationship falls apart, demanding a second chance. Self-serving and egotistical, he views reconciliation as a matter of winning his former spouse back rather than taking genuine accountability for his past cruelty.

Benji is the co-owner of Le Maison Grog. Content with a hedonistic, perpetually adolescent lifestyle, he thrives on the pub's late-night tourist traffic and casual encounters. He becomes openly hostile when his business partner expresses a desire to sell his share of the bar, viewing personal growth as a threat to their established routine.

Corinne is one of Shelby's friends who organizes the Parisian "divorce party" trip. Well-meaning but occasionally superficial, she encourages Shelby to participate in casual flings and inadvertently complicates matters by revealing their hotel location to Shelby's ex-husband.

Vanessa rounds out the trio of women on the divorce trip to Paris. She eagerly participates in the nightlife and sightseeing, often breaking away with Corinne to socialize with locals while leaving Shelby to process her emotions alone.

Jean-Luc is a Parisian man navigating the logistical and emotional challenges of his grandmother's severe dementia. Skeptical of outsiders, he requires convincing before allowing a strange American man to disrupt his grandmother's fragile routine at the care home.

Amandine is a Parisian woman engaged in an affair with a married man. She relies on him to pay her rent and uses calculated manipulation to keep his attention focused on her, growing frustrated when his marital obligations interfere with their encounters.

Cash is a professional music manager handling the logistics for a major European rock tour. He operates pragmatically, focusing on ticket sales and schedule adherence while managing his famous client's unpredictable behavior and unusual requests.

Cliff is an elderly, beret-wearing widower traveling with the Vietnam veterans' tour group. Affable but clumsy in his romantic pursuits, he frequently asks his fellow soldiers for advice on how to court a nurse traveling with their party.

Simon is a successful Parisian real estate agent who has spent decades disconnected from his American child. During their rare meetings, he displays a cold, dismissive attitude and voices xenophobic opinions regarding foreigners living in France, refusing to acknowledge his own parental failings.