"No I haven't [been given any guarantees]," The Independent quotes Millen as saying. "I have not really had that discussion with the chairman.
"I was proud to be asked to take over the team against Arsenal and enjoyed it, so I think it will be a case of the chairman decides on who he wants top bring in and the next question will be 'do I fit into that?'
"I have been here before. I am experienced now. I know how football works. If I am asked, I would love to stay and work at this football club."
Former Stoke City boss Tony Pulis became the early favourite to take the permanent position following Holloway's exit.