The session takes place on September 17 between 2.15pm and 3.15pm.
Questions can be about anything from council business to their favourite books and can be submitted beforehand to email@example.com along with the questioner’s Twitter handle.
Or tweet live during the hour with the hashtag #AskMKC.
Cllr Marland said: “We are a co-operative council and that means that it is vital for us to engage with the people of Milton Keynes.
“We will not shy away from difficult questions, including those about what these financially tough times will mean for Milton Keynes as we work through a difficult budget round.
“We do genuinely care about what the people of Milton Keynes have to say and I look forward to reading and answering the questions.”
Mrs Mills added: “This is a great opportunity for us. We want to be accessible to the people of Milton Keynes, understand what citizens think and give fair, honest answers to their questions.
“We will not be hiding behind the council’s communications team; it will be us reading the questions, providing the answers and typing the responses.”