Brian May got into the festive spirit by dressing up as Father Christmas to surprise fans at the Queen musical We Will Rock You in London on Monday (26Dec11).
The British rocker donned a wig, hat and red Santa suit to step onstage after a Boxing Day performance of the West End show, which features Queen's greatest hits.
May made sure to keep his appearance a secret and not even the members of the cast knew it was the legendary guitarist joining them for the curtain call.
A source tells The Sun, "At first the cast were unsure who was underneath the fake beard and costume. Then they spotted Brian's curly barnet (hair) and twigged (realised). No one suspected it was the guitar legend."