The cast of "It's Always Sunny in Philadelphia" will appeared on "Abbott Elementary." Here's how to watch, when it airs and what to know about the crossover.

When will the It’s Always Sunny in Philadelphia episode air? While we know for a fact that the Abbott Elementary episode of the two-part crossover event will occur on January 8, the exact date and time of the It’s Always Sunny portion has yet to be announced.

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Spoilers for the Abbott Elementary and It’s Always Sunny in Philadelphia crossover are ahead! If you haven’t watched the first half of this event yet, you can stream the Abbott episode with a Hulu subscription.

The new episode will air at 8:30 p.m. ET on ABC. Those without cable can watch the show for free through FuboTV or DirecTV Stream each offering a free trial to new users. Sling is another option for streaming the show,

The hit sitcom continues its winning streak with a fifth-season pickup, following record-breaking ratings and critical acclaim.