Lena Dunham and Jack Antonoff
After five years of dating, Lena Dunham and Jack Antonoff called it quits. News of their split broke on Jan. 9, but the Girls star and Bleachers frontman had reportedly already ended things back in December. 

"Jack and Lena were growing apart and it just made sense for them to end their relationship where it was," a source told E! News.

Dunham and Antonoff began dating in 2012, and sparked engagement rumors in April 2016. Though