Scottie is a 29-year-old recently divorced copy editor working at Butter Putter, a male-dominated golf company. She feels intensely isolated as the only unmarried woman in her office. Seeking to fit in and impress her CEO, she impulsively lies about having a husband. This fabrication forces her to hire a fake spouse for a mandated couples counseling session.

Wilder is a 27-year-old millionaire who retired after selling his successful app. Looking for ways to practice his newly acquired improvisational theater skills, he eagerly agrees to play Scottie's fake husband. He approaches the charade with enthusiasm and a strict adherence to the rules of improv. He maintains a highly protective watch over his brother following a family tragedy.

Sanders is an unconventional marriage counselor and the operator of Camp Haven, an exclusive couples retreat in the Catskills. He uses unorthodox methods to evaluate relationships. He immediately connects with Wilder over sports but makes Scottie uncomfortable with his sudden appearances and odd therapeutic exercises.

Chad is a finance employee working alongside Scottie at Butter Putter. He represents the exclusionary, male-dominated culture of the office. He is highly skeptical of Scottie's sudden claims about being married and actively works to expose her deception by questioning her story at every turn.

Mika is Scottie's best friend and Wilder's brother. He works as a bartender and provides a listening ear for Scottie's professional struggles. He facilitates the fake marriage plot by suggesting his brother for the role, knowing Wilder is looking for exciting experiences. He struggles with ongoing grief following the death of his father.

Denise is a makeup artist and one of Scottie's closest friends. She offers blunt, practical advice regarding Scottie's impulsive decisions and serves as an emotional sounding board.

Ellison is the CEO of the golf company Butter Putter and the only other woman in the office besides Scottie. She heavily values marriage and stability in her employees. Upon hearing of Scottie's marital troubles, she immediately books her a session with her own husband.

Matt is Scottie's ex-husband. Though he does not appear directly in the early events, his past behavior heavily influences Scottie's current insecurities. He was dismissive and highly critical of her physical appearance during their marriage.

Derek is Wilder's accountant and Denise's partner. He serves as a voice of reason, warning Wilder that participating in a fake marriage scheme is a terrible idea.

Danielle is Chad's wife. She participates in the retreat's activities, representing the established couples that Scottie feels pressured to emulate.