Elizabeth Alton webchat – your questions answered on Love Actually, Neil Patrick Harris and Marmite

The Olivier-nominated actor joined us live from the National Theatre to talk about crying on cue, why American TV takes so many risks and what she has in common with Hedda Gabler

'I've had many thrilling roles – Hedda, obviously, Amazing Amy, Stella in Streetcar. I'm a lucky girl.' ... Hedda Gabler's Elizabeth Alton. Photograph: Danielle Levitt for the Guardian