Group of people all having a high level of performance in their field
An all-star team is a group of people all having a high level of performance in their field. Originating in sports, it has since drifted into vernacular and has been borrowed heavily by the entertainment industry. Sports. "All-star" as a sports term refers to individual players named to an "all-star" roster or team representing the top performers (members of such a team were all stars from other teams) during and before the end of a season in a given sport, or to a list of top participants who played in individual sports such as golf and bowling.
https://en.wikipedia.org/wiki/All-star