Actress plays the British Prime Minister in the new season of The Crown.

“I read biographies, Charles Moores biography, and her autobiography.

Theres so much stuff out there, theres so much video, shes really well covered.

The Crown

Credit: Des Willie/Netflix

I watched pretty much everything I could get my hands on.

“I wore a bit of a body suit to pad me out a bit.

That wasn’t particularly comfortable.

Anderson explains that much attention was paid to recreating Thatcher’s coiffure.

“The hair, it took a long time to get it right,” says the actress.

So, that took some time, to not be too big, to get the coif just right.

She had really bad teeth.

We tried prosthetics, but they ended up being too over top.

We tried Blu Tack up in my gums at one point to see whether that would work.

In the end I discovered I just needed toact.”

The Crownseason 4 is now available to watch on Netflix.