Tue Nov 3, 4:06 PM ET
The actors came to the British capital to promote Robert Zemeckis' animated movie, which features their voices.
The three stars turned on the lights at Oxford Circus and Regent Street — London's main shopping areas — and at St. Paul's Cathedral. After that, tenor Andrea Bocelli and the St. Paul's Cathedral Choir led more than 14,000 people in a Christmas carol event.
The new movie was later screened at a cinema on central London's Leicester Square.
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