See Photos of the "Downton Abbey" Cast Then and Now

Dockery quickly became one of the breakout stars of "Downton" and has tackled roles on the big and small screens. She took on several high-profile roles, including the leading role in the crime drama "Good Behavior." Her latest project is the Netflix drama "Anatomy of a Scandal" in which she plays prosecutor Kate Woodcroft. Like her TV mom, Dockery is also a musician and has a musical duo, Michelle and Michael, with Michael C. Fox, who joined "Downton" in later seasons.