When the live-action Stargirl series was announced, it was as a part of the then upcoming DC Universe streaming service. Later, it was also revealed that the series would be broadcast a day later on The CW and its affiliated digital platforms. Well, the show seems to have done well enough to get a second season!
However, it looks like the series’ second season will not be landing on the DC Universe platform. It wasn’t announced when Stargirl season 2 would start, but the renewal was announced at the same time that The CW was announcing their Fall schedule, so we guess in that season.