Simon Cowell will return to the ITV variety talent show next year, alongside regular show judge Amanda Holden.
However, Michael McIntyre and David Hasselhoff will not be back for a second stint, after the former quit and the latter was dropped from the series.
The new lineup is expected to have four judges, but no other names have been confirmed yet.
Little Britain's David Walliams, Barbara Windsor, ex-EastEnders star Samantha Womack, Dannii Minogue and Paul O'Grady are all thought to be in the running for the final two slots.
Cattrall is a new contender for a spot on the show and is likely to battle it out for the second female slot on the panel with Womack, according to The Sun.
Britain's Got Talent returns to ITV1 in Spring 2012.