Thrust reverser system for a turbofan propulsive assembly of an aircraft, the thrust reverser system comprising: - a fixed structure and a translating structure adapted to define internally a sequential flow path for air, the translating structure being arranged slidable along an axial direction between a stowed position, wherein the translating structure is sealingly connected to said fixed structure, and an open position, wherein the translating structure is spaced apart from said fixed structure in the axial direction so as to define a circumferential opening between said translating structure and said fixed structure, said opening being adapted to allow the outflow of air towards the external environment; - an iris mechanism, comprising a plurality of blades jointly movable between a rest configuration, wherein they jointly define a passage for air, and a deployed configuration wherein said plurality of blades is adapted to at least partially occlude said passage; - a first actuator mechanism adapted to drive the sliding movement of the translating structure between said stowed position and said opening position; - a second actuator mechanism adapted to drive the movement of said plurality of blades of the iris mechanism between said rest configuration and said deployed configuration; wherein the first actuator mechanism and the second actuator mechanism are arranged for coordinated drive in such a way that: - when said translating structure is in said stowed position, said plurality of blades of the iris mechanism is in said rest configuration; - when said translating structure is in said opening position, said plurality of blades of the iris mechanism is in said deployed configuration wherein the first actuator mechanism comprises: - a runner, having a first portion extending parallel to said axial direction, and a second portion extending non-parallel to said first portion starting from said first portion; and - a pin connected for translation with said translating structure, the pin being arranged slidable inside said runner; wherein the second actuator mechanism comprises: - an actuation ring adapted to drive in rotation said plurality of blades of the iris mechanism between said rest configuration and said deployed configuration, and vice versa; wherein said pin is arranged to drag into rotation said actuation ring when the pin is slid inside said second portion of said runner. - a fixed structure and a translating structure adapted to define internally a sequential flow path for air, the translating structure being arranged slidable along an axial direction between a stowed position, wherein the translating structure is sealingly connected to said fixed structure, and an open position, wherein the translating structure is spaced apart from said fixed structure in the axial direction so as to define a circumferential opening between said translating structure and said fixed structure, said opening being adapted to allow the outflow of air towards the external environment; - an iris mechanism, comprising a plurality of blades jointly movable between a rest configuration, wherein they jointly define a passage for air, and a deployed configuration wherein said plurality of blades is adapted to at least partially occlude said passage; - a first actuator mechanism adapted to drive the sliding movement of the translating structure between said stowed position and said opening position; - a second actuator mechanism adapted to drive the movement of said plurality of blades of the iris mechanism between said rest configuration and said deployed configuration; wherein the first actuator mechanism and the second actuator mechanism are arranged for coordinated drive in such a way that: - when said translating structure is in said stowed position, said plurality of blades of the iris mechanism is in said rest configuration; - when said translating structure is in said opening position, said plurality of blades of the iris mechanism is in said deployed configuration - when said translating structure is in said stowed position, said plurality of blades of the iris mechanism is in said rest configuration; - when said translating structure is in said opening position, said plurality of blades of the iris mechanism is in said deployed configuration wherein the first actuator mechanism comprises: - a runner, having a first portion extending parallel to said axial direction, and a second portion extending non-parallel to said first portion starting from said first portion; and - a pin connected for translation with said translating structure, the pin being arranged slidable inside said runner; - a runner, having a first portion extending parallel to said axial direction, and a second portion extending non-parallel to said first portion starting from said first portion; and - a pin connected for translation with said translating structure, the pin being arranged slidable inside said runner; wherein the second actuator mechanism comprises: - an actuation ring adapted to drive in rotation said plurality of blades of the iris mechanism between said rest configuration and said deployed configuration, and vice versa; - an actuation ring adapted to drive in rotation said plurality of blades of the iris mechanism between said rest configuration and said deployed configuration, and vice versa; wherein said pin is arranged to drag into rotation said actuation ring when the pin is slid inside said second portion of said runner.