Katie Holmes' slutty pumpkin: 'How I Met Your Mother' first look clip

It's finally here, "How I Met Your Mother" fans: the slutty pumpkin is upon us. Monday's Oct. 31 episode of "HIMYM" takes us back to that fateful Halloween when Ted (Josh Radnor) met The Slutty Pumpkin. This year, they're finally reuniting -- and the highly-publicized pumpkin will be played by Katie Holmes.

"I'm gonna go make some Tootsie Rolls," she says. "It's a drink I invented. There's a song and dance that goes along with it, but I have to drink three of them before I can do it."

It's the perfect set up for Barney's (Neil Patrick Harris) "Ted, have you tasted her Tootsie Roll?" She basically walked right into it.

"Katie is a lovely and talented actress," says series creator Craig Thomas. "Which is why we've saved for her perhaps the most classily named character in our show's history."