Lilley played a supporting role in the 2011 film The Artist, temporarily portrayed Maxie Jones on the ABC soap opera General Hospital from September 2011 to August 2012, and has played the character of Theresa Donovan on NBC's soap opera Days of Our Lives from July 2013 to November 2016 and again from May to July 2018.

[8][better source needed] In 2011, Lilley had a supporting role in director Michel Hazanavicius's silent movie The Artist.

[9] In the fall of 2011, Lilley took over the role of Maxie Jones, as a temporary recast for Kirsten Storms on General Hospital while she was on medical leave for endometriosis.

[16] In June 2016, she confirmed she was exiting the soap due to the demanding filming schedule hindering her ability to pursue other commitments and opportunities.

[23] In the summer of 2014, Lilley traveled to Georgia, where she hosted and sang in a benefit concert with SOWEGA Art Performance to raise funds for ONEless Ministries,[24] and in December of the same year, sang at the 3rd Annual Westchester All Stars Christmas for Wounded Veterans Concert in New York.

[4][29][30] In June 2019, Lilley and Wayne adopted their two foster sons and in July 2019, she gave birth to a daughter.