United Kingdom, April 17 -- William McNamara initially branded Jim Carrey a "loser" when they worked together on Doing Time on Maple Drive.

The actor, now 61, did not think the then-unknown comedian, now 64, had potential to become a star because he showed up to a read-through for the 1992 TV movie looking "really shabby" compared to the polished, well-known stars around him.

Appearing on the latest episode of the Media Path podcast, William recalled: "They're all really established, good and well-dressed - and this guy comes in late - tall, gangly, thing guy with messy hair wearing a beat-up black t-shirt and torn black jeans and Keds."

He added: "He came in and right away I was depressed. I'm like, 'God, I thought we're gonna have a ...