Leah Remini has hit out at Scientology.

The 'King of Queens' star and her family dumped the organisation earlier this month after being subjected to years of abuse for questioning the actions of Church leader, David Miscavige, but now Leah has broken her silence since her departure and has vowed not to ''shut up'' about the secretive sci-fi cult.

Speaking to People magazine, she said: ''We stand united, my family and I, and I think that says a lot about who we are, and what we're about.

''I believe that people should be able to question things. I believe that people should value family, and value friendships, and hold those things sacrosanct.

''That for me, that's what I'm about. It wouldn't matter what it was, simply because no one is going to tell me how I need to think, no one is going to tell me who I can, and cannot, talk to.

''It doesn't matter, it could be anything. I thought about the family being broken up for some other cause, and I'm not about to shut up.''

The 43-year-old actress was subjected to five years of ''thought modification'' after she questioned where David's wife Shelley - who hasn't been seen in public since 2007 - was during Tom Cruise and Katie Holmes' wedding in 2006.

Remini - who has also queried the behaviour of the Sea Organisation sect within the church - has received much support from the public and her friends and family since quitting the church and it's something she's thankful for.

She released a statement earlier this month which read: ''I wish to share my sincere and heartfelt appreciation for the overwhelming positive response I have received from the media, my colleagues, and fans from around the world. I am truly grateful and thankful for all your support.''

The Church of Scientology was founded by American science fiction writer L. Ron Hubbard who claimed that extra terrestrial beings were sent to planet Earth by intergalactic ruler Xenu, who then blew up the aliens with hydrogen bombs in a volcano.

These aliens' souls then attached themselves to humans and cause problems that affect the happiness of individuals.