An Alligator Named Daisy (1955)
Returning from a cricket match in Ireland, Peter Weston gains a pet alligator from another passenger who abandons it with him. He is horrified and while his first instinct is to get rid of it he develops a relationship with a young Irishwoman who appears to be entwined with the reptile. He soon discovers that Daisy is tame and seems to be the way to Moira's heart. based on novel or book, alligator