Childs exited TOWIE after only its second series in early 2011, but has continued to pass judgement on the ITV2 programme in the press - most recently writing in her column that Mecklenburgh, her fiancé Mario Falcone and Chloe Sims should be axed.
Speaking to New Magazine, Mecklenburgh revealed that the entire cast are getting frustrated by the glamour model, and suggested that she would not be welcome back for the rumoured TOWIE movie if she continues.
"I'm getting a bit sick of her commenting on our show, to be honest," she admitted. "She left after series two, but all she does is comment on TOWIE and she says quite a lot of negative things. It's really starting to get on all of our nerves.
"I don't think she realises how much she is annoying the cast and then she goes and says she'd like to be involved in a TOWIE movie. She needs to stop talking about us."
Mecklenburgh added that she thinks Childs made a mistake leaving the show so early on.
"I don't dislike Amy, but she needs to remember where she came from," she stated. "I don't think it was a great move leaving so early."
The Only Way Is Essex series seven continues tonight (October 3) at 10pm on ITV2.