Lynch, who plays coach Sue Sylvester in the musical TV show, has confirmed talks have been going on with the 29-year-old singer, reported Femalefirst.
"There's been talk on set of Cheryl appearing for a year or so, but it's set to happen now. Matthew Morrison has spoken very highly of her (after she appeared in his film 'What To Expect When You're Expecting') and the younger guys on set are keen to have her on, for obvious reasons.
"Matthew's chatted to her and she seems keen. Cheryl's the perfect 'Glee' fit, she can sing, she can dance and she looks good. It would be cool if she played herself," she said.