martha coakley boston Attorney General Martha Coakley.
Credit: Nicolaus Czarnecki/METRO

Attorney General Martha Coakley, who lost a special election to fill former Sen. Ted Kennedy's seat, will announce this week that she plans to run for governor.

Following the announcement, Coakley will visit 18 cities this week, according to WCVB.

Coakley becomes the latest Democrat to jump into the race. The field includes another state politician - Treasurer Steve Grossman. Republican Charlie Baker, who lost to Gov. Deval Patrick in 2010, recently released a video announcing his second attempt.


Coakley lost to former Sen. Scott Brown in a special election in 2010 to fill Kennedy's seat after his death.

Follow Michael Naughton on Twitter @metrobosmike.