The Royle Family actress, who has rejoined the show as Gloria Price, originally played a lady referred to as Mrs Chadwick for a few months.
Speaking about her original stint on the ITV soap, she admitted: "I remember it so clearly because I was terrified.
"At the time, the characters were truly legendary and some of the actors were very intimidating. It really was true that if you sat in somebody else's seat in the green room, you'd get in trouble.
"Thankfully, Liz Dawn (Vera Duckworth) took me under her wing and we've been close friends ever since. She was one of the first people I called when I knew I was going to be in the show and she was delighted."
Recounting another meeting, the star went on: "One of my strongest memories from 30 years ago was being in the ladies' loos when Doris Speed (Annie Walker) entered. I froze. This was Doris Speed!
"I stood in awe as she chatted away to me ten to the dozen. She then brought her Annie Walker wig out of her bag still talking away. She popped it on, snapped into role, left the toilets and walked straight into the Rovers. I thought about that on the first day that I walked onto the Rovers set and had a chuckle to myself."
The 68-year-old, whose new character Gloria will arrive next Wednesday, revealed that the current cast have been more "welcoming", adding: "It's not like the old days."
However, she quipped: "So far, my only mistake has been calling Craig Charles 'Lloyd' and he laughed when I apologised."