Danny DeVito and Kaitlin Olson Can Help You Throw a Great Holiday Party. Really.

Therell never be a scenario in which fruitcake is appropriate, she says. Its funny to hear one of the stars of Its Always Sunny in Philadelphia talk about whether something is appropriate. Consider the shows holiday special, A Very Sunny Christmas.

Throw an 'Always Sunny' Holiday Party BusinessInsider USA Images

In a mere 43 minutes, a grown man realizes that his childhood Christmas tradition involved breaking into neighboring houses and stealing their presents; a rabid, illiterate guy bites a mall Santas neck; and a slimed-up, naked Danny DeVito is birthed from a leather couch.

The secret to the shows success, the stars say, is that the cast is down for anything.

Or, as DeVito describes it, they have an attitude of You know, why not? Olsons character has been set on fire, rammed headfirst into a car door, and unflatteringly compared to a bird.

Im surprised at how often Danny and I get asked, Is there anything that theyve written that youve said no to? Absolutely not.

Why not? has pushed them into history. For the time being, Sunny is tied with The Adventures of Ozzie and Harriet as the longest-running live sitcom (fourteen seasons!), and that pisses the duo off.

Its not fulfilling yet, Olson says. So we have to whip their ass, DeVito adds.

Here are their same no-holds-barred hot takes on several other holiday traditions beyond fruitcake.

Throw an 'Always Sunny' Holiday Party BusinessInsider USA Images

On ... Holiday Party Appetizers

Olson: You cant go wrong with a giant cheese board. Nuts, dried fruits, tons of different cheeses. Cut some rosemary off the bush that I know you have.

DeVito: Go to a good Italian cheese store and have them cut up imported provolone in squares, and take an anchovy and put it on there .

Olson: But dont put anchovies over all the cheese. Then people wont come to your party.

On... Re-gifting

Olson: I think its responsible, economical.

DeVito: Saves a lot of time.

Olson: Yes, its like recycling. And plus, if youre not going to use it and you know someone else would like it, I think its genius.

On... Holiday Cheer

DeVito: I really like eggnog. I make a great eggnog. I like to put a lot of booze in it. Make one with a lot of booze and one without.

Olson: Make a big old pot of apple cider, spice it up, and then you got your whiskey next to it so you can make a whiskey cider if you want. Then your whole house smells delicious. Thats my holiday trick.