By THR Staff At the beginning of June, Jimmy Fallon explained that this would be his “summer of ‘stache” and he’s been growing out a beard to prepare for his mustache debut since Memorial Day.

putting Jimmy back on top of the 11:35 p.m. slot. Maybe committing to the 'stache wouldn't be the worst idea after all. As for the rest of you aspiring mustache-growers—or Schnurrbartträgers ...

In an appearance on The Tonight Show on Monday, host Jimmy Fallon reunited Don Mattingly with his mustache. It was a heartwarming moment.

Yesterday, during a commercial break from The Tonight Show, Jimmy Fallon casually turned his scraggly beard into a full ‘70s mustache with a little help from a Brooklyn barber (as you do).