Woody Harrelson hosted SNL on Saturday night for the first time since 1989, which was a whopping 25 years ago!

In honor of that "1989," which is also the title of Taylor Swift's newest record-breaking album, Harrelson decided to parody Swifty's hit song "Blank Space." And a few of his "Hunger Games" castmates crashed the party to join him.

Declaring that he probably knows more about 1989 than Swift, Harrelson picked up a guitar to play his own rendition of her new single.

"Even if the memories are a little fuzzy," explained Harrelson before starting in on the tune. "Because of the drugs."

The actor poured his way through a funny mix of 1989 nostalgia, recalling having a mustache, starring on hit sitcom "Cheers," and, well, doing a lot of drugs.

"Hunger Games" heartthrobs Liam Hemsworth and Josh Hutcherson then strolled onto the stage, neither of whom were actually alive in 1989.

The star of the "Hunger Games" franchise, Jennifer Lawrence then joined her castmates. She looked hilariously uncomfortable as Harrelson grabbed her leg, exclaiming, "I can't believe it. The real Taylor Swift!"

Harrelson's monologue was definitely a treat for movie fans who are eagerly awaiting the release of "Hunger Games: Mockingjay Pt. 1" next week.

Throughout the remainder of the evening's episode of SNL, Harrelson couldn't help but make countless jokes about his well-known drug use.

In a sketch entitled "Stoner Woody," the actor plays one of several New York stoners who take to the streets in celebrate the a new law that allows the possession of up to 25 grams of marijuana in public.