Mumford & Sons doubled up as a Beatles tribute band called Hey, Dude during a skit on U.S. comedy show Saturday Night Live on Saturday (22Sep12).
Many ticket-holders couldn't get into the O2 Arena show on Tuesday night (September 19th) because they didn't bring photo ID to match their booking.
An album re-release, a new song and a documentary mark the singer's legacy this year.
The film will be the first in the Marvel Cinematic Universe led by a person of colour.
The actor plays the titular hero in the forthcoming adaptation.