Lewis told CultBox: “She was a-mazing! It was so unbelievable. I remember when I was doing the scene with me and her at the end of my episode and it got to my bit and I was like ‘oh crap, line, line!’, cos I was just staring at her and completely forgot.”

She added: “I felt very privileged to be around so many of the actors we’ve had.”

Asked whether she’d like to see Griffiths return in the next series, Lewis commented: “I hope so, I really hope so! It’d be amazing to carry on that storyline and elaborate on [Liv’s] relationship with parents and find out where her dad is.”

Episode 4 of the current series, focusing on the character of Liv, airs at 10pm tonight on E4.