Saturday Night Live featuring Woody Harrelson opened with a big surprise over the weekend: The Hunger Games trio helping their co-star on a Taylor Swift cover.

Harrelson hosted Saturday Night Live‘s new episode on November 15 to promote The Hunger Games: Mockingjay, Part 1 which opens on Friday. During his monologue, lead stars Jennifer Lawrence (Katniss), Josh Hutcherson (Peeta), and Liam Hemsworth (Gale) made a surprise appearance.

The trio tried to help Harrelson sing a new version of Taylor Swift’s “Blank Space” off her new studio album 1989. Though the three young actors were born after 1989 (boy, does that make us feel old), the stars helped Harrelson by singing about what he’s told them about that year.

Lawrence flubs her lines a little bit towards the end, but it made the live surprise that much more entertaining.

Related: Enter our huge Mockingjay giveaway!