Hollywood actor Matt Damon credits his baby for helping him get the worn out look of a man on the run in "The Bourne Ultimatum".
He says the little girl had kept him awake all night when he was shooting the sequel. Damon's wife Luciana gave birth to daughter Isabella in June last year, just before the actor began filming, contactmusic.com reported.
He says: "I look so exhausted... Even if I tried to have a methodical sleep-deprivation look in the film, it wouldn't be as authentic as me being up all night with a crying baby at home."