The David Tennant Treat 4 Today are some lovely comments Doctor Who actress Tracy Ifeachor made about David Tennant after filming episodes of the programme with David Tennant in an interview on the BBC website.
Her comments were:
And I remember meeting David Tennant. He was in the queue for lunch and I said 'hi, I'm Tracy' and I told him I liked his Hamlet.
Whenever he came onto the set, it was like a wave of sunshine, the effect he has on everyone. He's just a genuine, nice guy. And he really helped me, he was so approachable.
The full article (from when she was filming The End Of Time) can be read at this link.