Wiseau selected actors from thousands of head shots, although most of the cast had never been in a full-length film. Sestero had limited film experience and agreed to work as part of the production crew only as a favor to Wiseau, with whom he had been friends for some time before production began. Sestero then agreed to play the Mark character after Wiseau fired the original actor on the first day of filming. Sestero was uncomfortable filming his sex scenes and was allowed to keep his jeans on while shooting them.