A composition comprising i) a pseudotyped retroviral vector particle or virus-like particle thereof comprising: a) one envelope protein with antigen-binding activity, wherein said envelope protein is a recombinant protein that does not interact with at least one of its native receptors and is fused at its ectodomain to a polypeptide comprising an antigen binding domain specific for a tag of a tagged polypeptide, and wherein said envelope protein is protein H of a virus of the Paramyxoviridae family, wherein said protein H of a virus of the Paramyxoviridae family lacks at least one part of the cytoplasmic region of said protein H, b) one envelope protein with fusion activity of a virus of the Paramyxoviridae family, wherein said envelope protein with fusion activity lacks at least one part of the cytoplasmic region of said envelope protein, and ii) said tagged polypeptide, wherein said tagged polypeptide binds specifically to an antigen expressed on the surface of a target cell, thereby transducing the target cell with said retroviral vector particle or thereby inducing uptake of the virus-like particle into the target cell, wherein said Paramyxoviridae virus is a virus of the morbillivirus genus, and wherein said retroviral vector particle is a lentiviral or gammaretroviral vector particle. i) a pseudotyped retroviral vector particle or virus-like particle thereof comprising: a) one envelope protein with antigen-binding activity, wherein said envelope protein is a recombinant protein that does not interact with at least one of its native receptors and is fused at its ectodomain to a polypeptide comprising an antigen binding domain specific for a tag of a tagged polypeptide, and wherein said envelope protein is protein H of a virus of the Paramyxoviridae family, wherein said protein H of a virus of the Paramyxoviridae family lacks at least one part of the cytoplasmic region of said protein H, b) one envelope protein with fusion activity of a virus of the Paramyxoviridae family, wherein said envelope protein with fusion activity lacks at least one part of the cytoplasmic region of said envelope protein, and a) one envelope protein with antigen-binding activity, wherein said envelope protein is a recombinant protein that does not interact with at least one of its native receptors and is fused at its ectodomain to a polypeptide comprising an antigen binding domain specific for a tag of a tagged polypeptide, and wherein said envelope protein is protein H of a virus of the Paramyxoviridae family, wherein said protein H of a virus of the Paramyxoviridae family lacks at least one part of the cytoplasmic region of said protein H, b) one envelope protein with fusion activity of a virus of the Paramyxoviridae family, wherein said envelope protein with fusion activity lacks at least one part of the cytoplasmic region of said envelope protein, and ii) said tagged polypeptide, wherein said tagged polypeptide binds specifically to an antigen expressed on the surface of a target cell, thereby transducing the target cell with said retroviral vector particle or thereby inducing uptake of the virus-like particle into the target cell, wherein said Paramyxoviridae virus is a virus of the morbillivirus genus, and <EOS>