Jake Gyllenhaal And Marcus Mumford -- Hanging At Disneyland With Olaf (PHOTO)

Mumford & Sons frontman Marcus Mumford took a break from touring to bro down with pal Jake Gyllenhaal at Disneyland on Monday, and they had the best excuse to get to the front of the line ... Josh Gad aka Olaf in "Frozen," one of Disney's biggest films of all-time.

Jake and Marcus had already shared a turkey leg, hit up the Radiator Springs Racers and several other rides when they bumped into Gad, who was there with Ginnifer Goodwin and Josh Dallas. The group hopped aboard the Jungle Cruise ... Gyllenhaal and Gad had such a good time they got up on their feet to applaud the tour guide.

Josh had to be as popular as Mickey, don't you think?