Jimmy Fallon recreated Abbott and Costello's classic "Who's on First" routine on Thursday's episode of "Late Night with Jimmy Fallon," with the help of some very well-known guest stars.
Jerry Seinfeld and Billy Crystal both took part in the baseball-themed bit, donning old-fashioned uniforms and playing two of the uniquely-named infielders for the St. Louis Wolves.
The two stars are both big baseball fans -- Seinfeld cheers for the New York Mets, while Crystal roots for the Yankees.
This updated version of the routine featured the first, second and third basemen, named Who, What and I Don't Know, respectively. Steve Higgins played the bewildered baseball fan, while A.D. Miles played the second baseman.
Tell us: What do you think of this new version of "Who's on First"?