It's Alive! 56 years old

A farmer traps three people in a cave with his pet prehistoric monster.

Credits

Name	Character
Tommy Kirk He was 27, now 83 years old	as Wayne Thomas
Bill Thurman He was 48, 74 years old when he died	as Greely / Monster
Shirley Bonne She was 34, now 90 years old	as Leilla Sterns
Corveth Ousterhouse	as Norman Sterns
Annabelle Weenick She was 44, 78 years old when she died	as Bella

Name	Department
Robert B. Alcott as Director of Photography.	Camera
Jack Bennett as Special Effects. He was 48 (now 104) years old	Crew
Larry Buchanan as Director. He was 45 (81) years old when He died	Directing
Larry Buchanan as Editor. He was 45 (81) years old when He died	Editing
Larry Buchanan as Producer. He was 45 (81) years old when He died	Production
Larry Buchanan as Writer. He was 45 (81) years old when He died	Writing
Edwin Tobolowsky as Associate Producer.	Production