The New Adventures of Old Christine (2006)

Christine Campbell, a dedicated single mother, faces an unexpected challenge when her ex-husband starts dating a younger woman who shares her name. To differentiate between the two, the new girlfriend is humorously nicknamed New Christine, leaving Christine with the less flattering title of Old Christine. Balancing her professional life and the chaotic dynamics of her family and friends, Christine navigates the ups and downs of modern motherhood while contending with her ex's new relationship and the implications it has on her own life.