Collins made her on-screen debut as new Rovers Return manager Stella Price last week. Writing in her new magazine column, Marsh recalled meeting the ex-EastEnders star at the British Soap Awards last month.
"Michelle Collins made her Corrie debut as the Rovers' new manager Stella last week and I'm dying to see what's in store for her character," she wrote. "I met her at The British Soap Awards last month and she was very nice."
Antony Cotton and Charlie Condou were among Collins's co-stars who denied claims that cast members have complained about the northern accent the actress has put on for her new role. Marsh, who plays Michelle Connor, explained that she knows how difficult it is to maintain a different accent while acting.
"She said she's got a dialect coach to help her perfect her northern accent," she added. "I had lessons to learn a New York accent when I appeared in the stage show Saturday Night Fever, so I know how tough it is keeping it up all the time!"
Marsh, who will return to the ITV1 soap in September, previously described Collins's casting as "great".
> Kym Marsh blasts "small-minded cowards"