An outlet guide vane (62,100) for a gas turbine engine, said outlet guide vane comprising: a first flange; a second flange positioned radially outwardly from said first flange; an airfoil extending between said first and second flanges and coupled thereto, the airfoil comprising a leading edge, a trailing edge, a leading edge portion and a trailing edge portion, said leading edge portion and said trailing edge portion fabricated from a first material; wherein said airfoil has a profile that tapers outwardly from said leading edge at least partially towards said trailing edge and that tapers outwardly from said trailing edge at least partially towards said leading edge; a cavity; a filler portion coupled in the cavity, the filler portion comprising a first side and a second side, the filler portion fabricated from a second material, said second material different from said first material; a first skin coupled to the first side, the first skin fabricated from a composite material; and a second skin coupled to the second side, the second skin fabricated from a composite material; characterised in that the profile of said airfoil tapers inwardly from both of said leading edge portion and said trailing edge portion to define a first assembly surface and a second assembly surface, wherein said profile then tapers further inwardly to form the cavity, wherein said first assembly surface circumscribes said cavity on one side of said airfoil and said second assembly surface circumscribes said cavity on the other side of said airfoil, wherein said first skin is coupled to said first assembly surface such that said first skin is flush with both said leading edge portion and said trailing edge portion, and said second skin is coupled to said second assembly surface such that said second skin is flush with both said leading edge portion and said trailing edge portion. a first flange; a second flange positioned radially outwardly from said first flange; an airfoil extending between said first and second flanges and coupled thereto, the airfoil comprising a leading edge, a trailing edge, a leading edge portion and a trailing edge portion, said leading edge portion and said trailing edge portion fabricated from a first material; wherein said airfoil has a profile that tapers outwardly from said leading edge at least partially towards said trailing edge and that tapers outwardly from said trailing edge at least partially towards said leading edge; a cavity; a filler portion coupled in the cavity, the filler portion comprising a first side and a second side, the filler portion fabricated from a second material, said second material different from said first material; a first skin coupled to the first side, the first skin fabricated from a composite material; and a second skin coupled to the second side, the second skin fabricated from a composite material; characterised in that the profile of said airfoil tapers inwardly from both of said leading edge portion and said trailing edge portion to define a first assembly surface and a second assembly surface, wherein said profile then tapers further inwardly to form the cavity, wherein said first assembly surface circumscribes said cavity on one side of said airfoil and said second assembly surface circumscribes said cavity on the other side of said airfoil, wherein said first skin is coupled to said first assembly surface such that said first skin is flush with both said leading edge portion and said trailing edge portion, and said second skin is coupled to said second assembly surface such that said second skin is flush with both said leading edge portion and said trailing edge portion.