Kal Aaj Aur Kal

Rajesh is the London-educated grandson who loves Mona but is pressed by Diwan Bahadur Kapoor to marry Rukmani. He initially clashes with the elder’s plan, but ultimately agrees to sacrifice his own happiness for the family. This decision drives the central tension of the film and pushes the plot toward its reconciliatory turn.

Ram is the father who bears the brunt of the generational clash and ultimately steps back to avoid choosing sides. He endures the strain of the family rift and supports a path toward reconciliation, embodying patience and resilience in a divided household.

Mona is Rajesh's girlfriend whose love is central to the plot. She agrees to the plan that protects Rajesh's future and attends the wedding, ultimately becoming the person Rajesh marries in the pivotal reveal. Her loyalty and adaptability reflect the conflict between personal love and family strategy.

The family patriarch who advocates for a traditional marriage alliance to preserve lineage and status. He grows sick but remains the driving force behind the wedding plan, using his position to push the generations toward a resolution that honors family duty.

Achala is Monica's mother, a member of the family circle whose presence highlights the domestic and social pressures surrounding marriage. Her role centers on upholding family dynamics and contributing to the broader tension of whether tradition or personal choice should prevail.

Munshi acts as a clerk-like figure within the family circle, aiding in the logistics of the wedding arrangement. His involvement reflects the everyday social machinery that supports traditional arrangements in the narrative.

Ram's friend serves as a confidant who helps Ram navigate the plan to stabilize the family rift. He represents the practical, and sometimes humorous, external perspective that feeds into the deception used to reconcile the generations.

Sunny is depicted as Rajesh's college-mate, a minor presence that adds texture to Rajesh's younger-generation circle. His character helps illustrate the social setting of youth and education in the era.