In 2001, she joined the Canadian teen drama television series
Edgemont as recurring character Bekka Lawrence, later becoming a series regular on the show, She guest starred in an episode of
The L Word as Roxanne in 2004. She went on to appear as a series regular in the short-lived ABC teen drama series
Life as We Know It as Sue; the series which ran for just one season. In 2006, she appeared in the film ''
She's the Man and co-starred in The Covenant. She was cast in another ABC television pilot, Secrets of a Small Town'', though it was not picked up to series. In 2007, she joined the cast of
CSI: Crime Scene Investigation playing the recurring character of Ronnie Lake. Despite appearing in four episodes, rumours were denied that she would be a permanent replacement for
Sara Sidle. The character was written out of the series with no explanation. She also appeared in a made-for-television film
Split Decision. In 2008, she guest starred as Kimberly MacIntyre in four episodes of
The CW's
90210. She also starred in a leading role as Lily in
J. J. Abrams Cloverfield, which was a box office success and was well received by critics. She was cast as Lisa in the film
Amusement in 2006; the film was set to be released theatrically by
New Line Cinema, but after a negative reaction it was released instead straight-to-DVD in 2009. The same year, Lucas was announced to have signed on as
Riley Richmond, one of the lead roles in another
CW television series
Melrose Place, a follow-up to the popular 1990s series of the same name. Lucas was part of the main cast of the
NBC sitcom
Friends with Benefits, which aired during the summer of 2011 before being cancelled. In 2011, she played Haley in
Big Mommas: Like Father, Like Son, where she showcased her singing talents as well as her acting skills. In 2012, Lucas was cast as the lead character, Skye Yarrow, in the CW series
Cult, which was filmed in the spring of 2012. In 2012, she was cast in a main role in the
2013 remake of the classic horror film
The Evil Dead. In 2014, Lucas appeared in
Pompeii directed by
Paul W. S. Anderson. From 2015 to 2019, she has had a regular role in
Fox's
Gotham as
Tabitha Galavan. In 2019, Lucas played the starring role of Kate Jameson in the Canadian crime drama television series
The Murders which aired on
Citytv. In late 2020, she was cast in the regular role of Billie in the fourth season of the Fox medical drama television series
The Resident. ==Personal life==