An airfoil for a turbine engine, the airfoil comprising: a leading edge; a trailing edge; a pressure side wall connecting the leading edge and the trailing edge; and a suction side wall spaced apart from the pressure side wall, the suction side wall connecting the leading edge and the trailing edge; and an internal cooling channel (150, 152) formed between the pressure side wall and the suction side wall, the internal cooling channel (150, 152) comprising: at least one pedestal (154; 454) having a first pedestal end (158; 458) connected to the pressure side wall and a second pedestal end (156; 456) connected to the suction side wall; a first fillet (162; 262; 462; 562) disposed around the periphery of the first pedestal end (158; 458) between the pressure side wall and the first pedestal end (158; 458); and a second fillet (160; 260; 360; 460; 560) disposed around the periphery of the second pedestal end (156; 456) between the suction side wall and the second pedestal end (156; 456); wherein at least one of the first fillet (162; 262; 462; 562) and the second fillet (160; 260; 360; 460; 560) includes a profile that is non-uniform around the periphery of the corresponding pedestal end (156, 158; 456, 458); characterised in that the profile in a direction perpendicular to the corresponding side wall is a simple curve described at any point around the periphery of the corresponding pedestal end (156, 158; 456, 458) by a single radius of curvature at that point; the profile at a first point (164; 264; 366; 466; 564) includes a first local maximum value of the radius of curvature; the first point (164; 264; 366; 466; 564) being a point around the periphery nearest the leading edge. a leading edge; a trailing edge; a pressure side wall connecting the leading edge and the trailing edge; and a suction side wall spaced apart from the pressure side wall, the suction side wall connecting the leading edge and the trailing edge; and an internal cooling channel (150, 152) formed between the pressure side wall and the suction side wall, the internal cooling channel (150, 152) comprising: at least one pedestal (154; 454) having a first pedestal end (158; 458) connected to the pressure side wall and a second pedestal end (156; 456) connected to the suction side wall; a first fillet (162; 262; 462; 562) disposed around the periphery of the first pedestal end (158; 458) between the pressure side wall and the first pedestal end (158; 458); and a second fillet (160; 260; 360; 460; 560) disposed around the periphery of the second pedestal end (156; 456) between the suction side wall and the second pedestal end (156; 456); wherein at least one of the first fillet (162; 262; 462; 562) and the second fillet (160; 260; 360; 460; 560) includes a profile that is non-uniform around the periphery of the corresponding pedestal end (156, 158; 456, 458); characterised in that the profile in a direction perpendicular to the corresponding side wall is a simple curve described at any point around the periphery of the corresponding pedestal end (156, 158; 456, 458) by a single radius of curvature at that point; the profile at a first point (164; 264; 366; 466; 564) includes a first local maximum value of the radius of curvature; the first point (164; 264; 366; 466; 564) being a point around the periphery nearest the leading edge. at least one pedestal (154; 454) having a first pedestal end (158; 458) connected to the pressure side wall and a second pedestal end (156; 456) connected to the suction side wall; a first fillet (162; 262; 462; 562) disposed around the periphery of the first pedestal end (158; 458) between the pressure side wall and the first pedestal end (158; 458); and a second fillet (160; 260; 360; 460; 560) disposed around the periphery of the second pedestal end (156; 456) between the suction side wall and the second pedestal end (156; 456); wherein at least one of the first fillet (162; 262; 462; 562) and the second fillet (160; 260; 360; 460; 560) includes a profile that is non-uniform around the periphery of the corresponding pedestal end (156, 158; 456, 458); characterised in that the profile in a direction perpendicular to the corresponding side wall is a simple curve described at any point around the periphery of the corresponding pedestal end (156, 158; 456, 458) by a single radius of curvature at that point; the profile at a first point (164; 264; 366; 466; 564) includes a first local maximum value of the radius of curvature; the first point (164; 264; 366; 466; 564) being a point around the periphery nearest the leading edge.