“House of Cards” star, Kate Mara, and her boyfriend Max Minghella have broken up after dating for four years, according to Us Weekly.

The two, who have reportedly been in an on-again, off-again relationship, started dating in 2010, but the reason behind their split remains unclear. Earlier this summer, Mara and “The Internship” actor were photographed looking happy together.

"Max and Kate have broken up and gotten back together a few times over the course of their relationship, but this one looks like it's sticking," a source told Us Weekly. "The relationship just ran its course."

The 31-year-old actress was not seen with Minghella at the Emmy Awards last Monday. Mara was reportedly seen partying with her friend stylist Johnny Wujek, who also reportedly accompanied her for the Venice Film Festival to Italy this week.

Mara was nominated for Outstanding Guest Actress in a Drama Series for her role in the political drama "House of Cards," but she lost the award to Allison Janney.

Wujek has been recently posting many photos of him with Mara on his Instagram account, including a selfie with Mara and Lena Dunham from Venice.

Minghella, the actor son of late filmmaker Anthony Minghella, previously dated model Leigh Lezark, while Mara has been linked to actor Charlie Cox in the past.