Son Of Dracula (1974)

aka's: Young Dracula/Count Downe

Due to be crowned King of the Netherworld by his mentor Merlin the Magician (Ringo Starr) at a monster's convention, Count Downe (Harry Nilsson), the son of Count Dracula (Dan Meaden), falls in love with the beautiful but human Amber (Suzanna Leigh) and finds himself in conflict with Baron Frankenstein (Freddie Jones) who is vying for the same honorary title.