WATCH: Find Out How Anna Faris Pranks Her Mom with Sexy Mail


Anna Faris and Conan O'Brien

09/10/2014 AT 09:00 AM EDT

Chris Pratt isn't the only skilled jokester in his marriage.

Wife Anna Faris knows a prank or two herself.

The Mom star, 37, stopped by Conan on Tuesday to share one of her favorite practical jokes.

While the actress is all about embracing the silly, her mother is a tad more conservative. Faris takes advantage of this difference by anonymously bombarding her mom's mailbox with sexy '80s postcards. The fact that Faris's family is good friends with the mailman makes this prank even better.

"As he's putting the postcard into the mailbox, I see my mom envisioning that, and I can feel her getting annoyed," she said. "And I delight in that."

Faris proves – celebrity or not – family means knowing the perfect way to embarrass the ones you love.

WATCH: Find Out How Anna Faris Pranks Her Mom with Sexy Mail| Conan, Anna Faris, Chris Pratt, Conan O'Brien

Chris Pratt and Anna Faris

Gregg DeGuire / WireImage

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