Starting off the work week, Jake Gyllenhaal got down to business on the set of "Nightcrawler" in Los Angeles on Monday (October 14).

Looking casual, the "Day After Tomorrow" actor sported dark slacks, a button up and sunglasses as he shot scenes for the upcoming thriller.

Though details are still under wraps, the flick is set to follow Jake as a freelance crime reporter who is exploring Los Angeles' criminal nightlife.

"Nightcrawler" is directed and written by Dan Gilroy and will also star Rene Russo.