Final answer:
The 1963 movie that begins with Princess Dala receiving the world's largest diamond from her father is 'The Pink Panther'.
Step-by-step explanation:
The 1963 movie named after the world's largest diamond, a gift to Princess Dala of the fictional country of Lugash as a child, is 'The Pink Panther'.
This diamond serves as a central plot point in this classic comedy film that mixes elements of slapstick and intrigue. The diamond 'The Pink Panther' is not just a valuable gem but also a symbol around which the film's narrative revolves, setting off a series of comedic events and misunderstandings.