Jake Gyllenhaal and Alyssa Miller are back together.

The End of Watch star, 33, ended his six-month relationship with the 24-year-old model in December after they struggled to cope with him relocating to Los Angeles from New York to shoot his upcoming film Nightcrawler, but they really missed each other.

"It has been less than two weeks so it is new again," a source said.

The couple were in regular contact throughout their time apart, and another insider said, "They were still talking during the break. When he was done with Nightcrawler he was spending a lot of time by himself and with his family over the holidays and he missed her.'"

Jake pulled the plug on his romance with the Sports Illustrated beauty before Christmas, as they could no longer handle having a long distance relationship. "[Jake] was very taken with [Miller], but I think their work definitely drew them apart. I know people are bummed, because many thought he had a chance this time," a source said at the time.