Zoë Ball. Zoë Ball was 42 in Doctor Who Live: The Next Doctor as 'Self - Host'.
Peter Capaldi. Peter Capaldi was 55 in Doctor Who Live: The Next Doctor as 'Self'.
Jenna Coleman. Jenna Coleman was 27 in Doctor Who Live: The Next Doctor as 'Self'.
Matt Smith. Matt Smith was 30 in Doctor Who Live: The Next Doctor as 'Self'.
Mark Gatiss. Mark Gatiss was 46 in Doctor Who Live: The Next Doctor as 'Self'.
Peter Davison. Peter Davison was 62 in Doctor Who Live: The Next Doctor as 'Self'.
Bernard Cribbins. Bernard Cribbins was 84 in Doctor Who Live: The Next Doctor as 'Self'.
Colin Baker. Colin Baker was 70 in Doctor Who Live: The Next Doctor as 'Self'.
Alex Kingston. Alex Kingston was 50 in Doctor Who Live: The Next Doctor as 'River Song (archive footage)'.
Karen Gillan. Karen Gillan was 25 in Doctor Who Live: The Next Doctor as 'Amy Pond (archive footage)'.
Janet Fielding. Janet Fielding was 59 in Doctor Who Live: The Next Doctor as 'Self'.
Daniel Roche. Daniel Roche was 13 in Doctor Who Live: The Next Doctor as 'Self'.
Steven Moffat. Steven Moffat was 51 in Doctor Who Live: The Next Doctor as 'Self'.
Simon Staffurth. Simon Staffurth was >> in Doctor Who Live: The Next Doctor as 'Director'
Paul Powell. Paul Powell would have been no older than 62 in Doctor Who Live: The Next Doctor as 'Writer'