Sophie Turner is basically the queen of the internet. We know her as Sansa Stark and also the wife of Joe Jonas (though, she's much more than just a J-Sister).
If Sophie Turner is willing to step in to help out on the Lizzie McGuire reboot, there's no reason we should stop her.
It was recently revealed that the Lizzie McGuire revival was delayed because showrunner Terri Minsky stepped down. With the show showrunner-less, it's unclear exactly how long the delay is going to be.