Ernest P. Worrell

First appearance: Dr. Otto and the Riddle of the Gloom Beam (1986) [Yeah, I know Ernest was doing commercials and stuff before this movie but this is his first movie appearance]

Beloved comercial personality Ernest P. Worrell makes a couple brief appearances in the Jim Varney movie Dr. Otto and the Riddle of the Gloom Beam, which is an odd 80s comedy where Varney plays a variety of characters (all disguises of Dr. Otto). Eventually Ernest gets a chance to star in his own movie Ernest Goes to Camp. If you’re going to watch an Ernest movie I’d suggest any of the Touchstone flicks and/or Ernest Rides Again.
Since everyone likes "Goes to Camp" here's the trailer for that: