Hitting his mark to address the enthusiastic audience was not the Elf star, but rather Red Hot Chili Peppers drummer Chad Smith, who was dressed in the same blue suit and styled the same way as the former.

The funnyman soon found his groove thanks to an audience question from the show's actual musical guest Paul McCartney. Smith joined the duo again at the tail end of the monologue to help kick the show to commercial.

Former “Saturday Night Live” cast member Will Ferrell returned to the iconic sketch comedy series for its Season 51 finale on May 16, delivering a memorable opening monologue alongside Chad Smith and a surprise appearance from Paul McCartney.