Faynia Williams writes: I had the privilege to direct the 16-year-old Katrin Cartlidge (obituary, September 9) in her first professional appearance on stage, at Brighton Actors' Workshop.

Katrin was a joy to work with: her boundless energy (I asked her to jump on a chair and she stayed bouncing for five minutes!), her commitment to the text, her ability to listen and hear, to look and see, and her unusual rhythms, were signs of a rare talent. It grew as she did, and it was heartening to see how she always "stuck to her guns" - one of her teenage credos - in everything she did.

Andy Holyer writes: I first encountered Katrin Cartlidge in 1994, when she rented my flat in Hampstead. The estate agent announced rather doubtfully that "she's been in a film called Naked". Over the months that followed, the usual landlord/tenant letters established our friendship, and, when I married and moved back to London, we met up with her and her partner Peter. There followed an occasional, but warm, friendship - postcards arriving from unusual locations, news of new film projects on the horizon.

By an extraordinary coincidence, Katrin's sister Michelle, a children's books illustrator, used to share a house with the widow of my wife's cousin. When our son Nicholas was born, a bottle of Moet arrived by courier, and a copy of one of Michelle's books the following Christmas.

Following the success of Career Girls, Katrin bought my flat, which, being just around the corner from her parents' house, was very convenient for her. Alison, Nicholas and I have many fond memories of her: adding a touch of glamour to our Christmas party; the occasional excitement of a feature in the paper; the dreadfully ugly award which stood service to keep the bedroom door open.