Watch the Last Time Harry Styles & Jimmy Fallon Were on TV Together Before 'SNL'

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One Direction members Liam Payne, Louis Tomlinson, Niall Horan, Zayn Malik and Harry Styles during an interview with host Jimmy Fallon on Dec. 23, 2014.

Harry Styles and Jimmy Fallon will be tag-teaming as the host and musical guest pair on the April 15 episode of Saturday Night Live. But what some people may have forgotten is that it's not their first time on TV together -- remember when Styles paid a visit to The Tonight Show Starring Jimmy Fallon with his boys of One Direction, Zayn Malik and all? 

The December 2014 appearance was actually 1D's first (and last) Fallon appearance for the band, involving plenty of hilarity, including an interview held on the floor, a discussion of Christmas traditions, and even a classroom instruments sing-along. And, of course, Styles was the one with the driest humor to counteract that of Fallon's.

Fallon showed the audience One Direction's vinyl copies of FOUR, which pictured the band sitting on the floor of a studio. "This is how we hang out, actually," Styles quipped. Naturally, Fallon turned Styles' smart-ass remark into an instant classic Tonight Show moment, with all five 1D guys and Fallon taking a seat on the floor for the remainder.

Perhaps the funniest moment of the floor interview was when Fallon tried his best British accent -- while all the boys were completely cracking up over it, Styles would hardly even crack a smile. Maybe SNL will be Fallon's redemption in tickling Styles' funny bone? It won't be long before we find out.

Watch clips from Styles and Fallon's last TV appearance together below.