The Insider.com

On October 31, Katie Holmes joins a long list of stars (Britney Spears, Enrique Iglesias, Joe Manganiello, Rachel Bilson, Kim Kardashian) who've stopped by How I Met Your Mother -- and now you can watch three clips of the actress as The Slutty Pumpkin.

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"Katie is a lovely and talented actress, which is why we've saved for her perhaps the most classily named character in our show's history," exec producer Craig Thomas said. Adding that the part is "literally six seasons in the making."

Fans of the show will remember that Ted met this loose fruit 10 years ago at a Halloween party, but lost her number. He's now spent the last decade romanticizing the relationship -- which results in a very unfortunate series of events in Monday's episode, titled Perfect on Paper.