Jake Gyllenhaal  and Michelle Monaghan laughed, smiled, and cuddled close as they posed together at their Source Code  screening afterpary in NYC last night. The two are in their home stretch of promoting the film stateside, and it arrives in theaters today — check out Buzz's rave review here . Lindsay Lohan  hit the red carpet at the event after a wild evening out in the city on Wednesday , though she insists that falling in the street was all a joke . Perhaps she was getting in the April Fools' Day  spirit early? Jake had a big smile on his face for all the photos and his sweet charm was front and center earlier in the day when he was caught in the middle of Carrie Ann Inaba's engagement surprise .