He started his standup routine yesterday morning and wants to keep telling jokes until 11 tonight.
He is trying to set a new Guinness record for standup comedy.
He's shooting for 40 hours at the Comedy Connection in Portland, Maine.
The current record, set by an Australian, is 38 hours, 6 minutes.
There's a timekeeper present and there must be at least 10 people in the audience at all times.
The Portland Press Herald reports Marley's marathon of jokes will benefit the Barbara Bush Children's Hospital at Maine Medical Center.
