You would call a group of performers something different based on what they are performing, and how many of them there are. For example, a group of performers in a certain type of play could be referred to as a troupe, and a group of 5 musicians in a quintet.
A group of three performers is typically called a trio.
A group of performerstrio
A group of performerstrio
A group of 5 performers who perform together is commonly referred to as a quintet.
In music, a quartet is an ensemble of four singers or instrumental performers. In pop music they would be a "group".
The cast of Last Call Vegas with Blue Man Group - 2003 includes: Carson Daly as Himself - Host Blue Man Group as Themselves - Performers
troupe
A group of performerstrio
On a theatre stage it is a company of actors and actresses.In television it is a cast.A group of actors (street performers) that travel between performances, it is a troop.
I've not heard of the phrase 'photo call' used in the sense of actual telephones but a 'photo call' in the entertainment industry refers to a request for a group of theatrical performers to come in to be photographed for promotional and media relations reasons.
The Corries were a Scottish folk group that was active between the 1960s and 1990. The main performers of the group were Roy Williamson and Ronnie Browne.