Funnyman Ed Helms was exhausted while filming the first movie in The Hangover trilogy because he didn't sleep for days at a time as he tried to balance filming the movie in Las Vegas with his commitments on Tv show The Office in Los Angeles.
The actor was given permission to film The Hangover around his Tv schedule as long as he showed up for work on time and covered his transportation costs.
Helms tells The Hollywood Reporter, "I had to agree to charter my own flights, these little tiny jets, which I paid for. I'd go from Las Vegas to Van Nuys Airport at four in the morning because we were doing shoots all night, then I'd land in Van Nuys, drive to the set and shoot all day on The Office, completely Red Bull-ed (energy drink) out of my brain."
His dedication paid off and The Hangover was a break-out hit when it was released in 2009. Helms stars in the third installment of the franchise, which will hit cinemas this summer (13), after the finale of The Office airs in America.