A gas turbine engine, comprising: a fan section; a compressor section disposed adjacent to the fan section; a combustor section disposed adjacent to the compressor section; a turbine section disposed adjacent to the combustor section; and a fan blade incorporated into a rotor provided with at least one of the fan section and the compressor section, the fan blade comprising: a blade body having a pressure side disposed opposite a suction side; a shape memory alloy actuator operatively connected to the blade body; and a sensor assembly in communication with the shape memory alloy actuator, the sensor assembly arranged to provide a signal indicative of vibration of the fan blade, wherein the shape memory alloy actuator is arranged to apply a load to the blade body, in response to the signal, characterised in that: the blade body defines a passageway disposed between the pressure side and the suction side, wherein the passageway extends radially between a root and a tip of the blade body; wherein the shape memory alloy actuator: is disposed within the passageway; extends from the root of the blade body towards the tip of the blade body; and is defined by a cellular structure that extends radially from the root towards the tip and extends axially from the leading edge towards the trailing edge, the cellular structure defining the blade body, the cellular structure having a first portion defining the shape memory alloy actuator that is disposed between the leading edge and the trailing edge and extends from the root towards the tip. a fan section; a compressor section disposed adjacent to the fan section; a combustor section disposed adjacent to the compressor section; a turbine section disposed adjacent to the combustor section; and a fan blade incorporated into a rotor provided with at least one of the fan section and the compressor section, the fan blade comprising: a blade body having a pressure side disposed opposite a suction side; a shape memory alloy actuator operatively connected to the blade body; and a sensor assembly in communication with the shape memory alloy actuator, the sensor assembly arranged to provide a signal indicative of vibration of the fan blade, wherein the shape memory alloy actuator is arranged to apply a load to the blade body, in response to the signal, a blade body having a pressure side disposed opposite a suction side; a shape memory alloy actuator operatively connected to the blade body; and a sensor assembly in communication with the shape memory alloy actuator, the sensor assembly arranged to provide a signal indicative of vibration of the fan blade, wherein the shape memory alloy actuator is arranged to apply a load to the blade body, in response to the signal, characterised in that: the blade body defines a passageway disposed between the pressure side and the suction side, wherein the passageway extends radially between a root and a tip of the blade body; wherein the shape memory alloy actuator: is disposed within the passageway; extends from the root of the blade body towards the tip of the blade body; and is defined by a cellular structure that extends radially from the root towards the tip and extends axially from the leading edge towards the trailing edge, the cellular structure defining the blade body, the cellular structure having a first portion defining the shape memory alloy actuator that is disposed between the leading edge and the trailing edge and extends from the root towards the tip. the blade body defines a passageway disposed between the pressure side and the suction side, wherein the passageway extends radially between a root and a tip of the blade body; wherein the shape memory alloy actuator: is disposed within the passageway; extends from the root of the blade body towards the tip of the blade body; and is defined by a cellular structure that extends radially from the root towards the tip and extends axially from the leading edge towards the trailing edge, the cellular structure defining the blade body, the cellular structure having a first portion defining the shape memory alloy actuator that is disposed between the leading edge and the trailing edge and extends from the root towards the tip. is disposed within the passageway; extends from the root of the blade body towards the tip of the blade body; and is defined by a cellular structure that extends radially from the root towards the tip and extends axially from the leading edge towards the trailing edge, the cellular structure defining the blade body, the cellular structure having a first portion defining the shape memory alloy actuator that is disposed between the leading edge and the trailing edge and extends from the root towards the tip.