Five years and countless dog-related dramas later, Lena Dunham and Jack Antonoff are apparently done. From E! News: “It was mutual,” our insider says. “Jack and Lena were growing apart and it just made sense for them to end their relationship where it was.” Luckily, their split was far from messy, as the source adds, “They want the best for each other no matter what. They are both moving on.