A diamond thief hides his loot on an innocent child, but the child turns out to be an adult posing as a youngster to purchase a half-priced train ticket. Now, the thief will have to outwit the eccentric in a series of wacky misadventures.

Kishore Kumar
as Vijay/Munna/Vijay's mom in photograph

Madhubala
as Asha/Rajni Devi

Pran Sikand
as Raja Babu/Chacha

Shammi
as Lily

Manorama
as Asha's Aunt

Helen
as Stage Dancer

Pradeep Kumar
as Passerby in front of basket store (uncredited)

Tun Tun
as Real Munna's Mother

Moni Chatterjee
as Seth Lalchand