Jake Gyllenhaal kicked off the first day of filming on his new project, An Enemy, in Toronto today. He got into character in a disheveled suit and the grown-out facial hair that he's been sporting for the last few months. Over the weekend, Jake was in NYC, where he's been hanging out with friends and family. He shared a walk with his sister Maggie before she welcomed a baby girl in April and was also spotted partying with pals. Jake met up with Jay-Z for a guys' night out at the Standard along with Pharrell Williams. It looks like Jake is turning his focus to business now, though, since he's started working on set in Canada and also has End of Watch hitting theaters this Fall.