Aniston, 44, who will tie the knot with Theroux soon, said he likes to hide and then surprise her, reported Daily Mirror.
"He calls it trickery. He's constantly hiding behind drapes and I'm constantly scared. It's like, it doesn't get old on me. Then I say, 'Here's the thing, I won't do that sort of elaborate scream. I'll sneak up and then once I hit the body, then scream," she said.
The former 'Friends' star recently said that she does not have a wedding dress yet, and joked that all the planning for her big day might make her crazy.