Michelle Dockery has split from her boyfriend Joseph Millson, according to a new report.

The Downtown Abbey star began romancing the Casino Royale hunk earlier this year (12) and they recently hit the red carpet together at the Emmy Awards in Los Angeles in September (12).

However, after just five months of dating, the couple has now called it quits.

Joseph Millson appears to have confirmed the break-up on Twitter.com, writing, "Just wait for someone worth being in a relationship with. Stop wasting your time on the ones who don't deserve you."