David Tennant and Sophie Aldred will be voicing characters on an upcoming Cbeebies show called 'Tree Fu Tom', set to air in early 2012.
Kay Benbow, controller of CBeebies, said: "We have a fantastic cast on this show, who work brilliantly as a team. Their rapport permeates through to the programme reflecting the characters as a group of friends working together. We are delighted to have David on board as part of the team. The physical energy in his performance works so well for animation and his sense of fun and cheeky humour will delight the older CBeebies audience."
Sophie Aldred played Ace, companion of the Seventh Doctor, whilst Tennant played the Tenth Doctor.
