David Tennant will replace Christopher Eccleston as star of the BBC's tentpole sci-fi series Doctor Who.
Tennant, star of BBC period drama Casanova, will become the 10th Time Lord when filming starts on the new series this summer in Cardiff, Wales.
Eccleston quit last month after only one series as the Doctor.
Tennant will be reunited with writer and executive producer Russell Davies, who wrote Casanova.
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