Last month, the former Blind Date host reaffirmed her desire to secure a guest stint on the soap, explaining that she would like to appear as herself in "a couple of episodes".
Writing in her New magazine column, Marsh predicted that Black would prove a hit if she ever joined the show.
The actress, who plays Michelle Connor, explained: "Cilla Black has said she'd like a cameo on Corrie as herself and is just waiting for the call. How fantastic would that be? She'd fit in brilliantly as a friend of Audrey's.
"I saw her guest appearance on Benidorm and she proved she's game by getting involved with the fictional Middlesbrough Swingers Association!"
Black has previously spoken of her love for Coronation Street a number of other times, stating that she would "die happy" if she ever landed a role on the cobbles.