"Al Gough and Miles Millar have been great partners and instrumental in the development and success of Smallville. While we are sad to see them go, we are very excited to announce that Executive Producers Todd Slavkin, Darren Swimmer, Kelly Souders and Brian Peterson will helm the show next season. Todd, Darren, Kelly, and Brian have been writing for the show for the past six seasons, and as producers for the last four years, they have played an integral role in the ongoing creative evolution of the series. As showrunners, they will continue to deliver the compelling storytelling that Smallville fans have come to expect and love."
Both actors have reportedly worked out deals to spend less time on the show next season, appearing in a fraction of the episodes they typically act in. This happens to coincide with what is almost certainly Smallville's final season--its eighth.