It's always funny when the actors of a show get their real-life partners to join them on set, and this was definitely the case when Mila Kunis (as Vivian) randomly showed up at the beach house.
Of course, there were some jokes by Walden (Ashton Kutcher) about marrying her (which he does in the real world), and any fan of this pair would definitely find this utterly hilarious.
Miley Cyrus was Hannah Montana until 2011, and she broke out into adulthood and more mature roles soon after, and that included playing the eccentric, loud, and bubbly Missy on this sitcom.
She awkwardly dates Jake before she flees the series, but each scene with this talented gal is iconic.
For all fans of The Breakfast Club, it was a really exciting moment to see alum Judd Nelson appear on the show, although briefly. He plays Lyndsey's ex-husband, who also happens to be stalking them.
Alan, of course, is terrified of him, and it makes for a pretty hysterical scene in the coffee shop. Judd Nelson's flair in this role makes it all the more hilarious.
If it wasn't weird enough that Charlie Harper is killed off, it's even weirder that Kathy Bates comes back as his ghost.
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