This contribution describes catalytic tandem CN and CC bond-forming reactions involving the intramolecular hydroamination/bicyclization and intermolecular hydroamination/ cyclization of olefins and alkynes using the organolanthanide complexes Cp'2LnCH (SiMe3) 2 and Me2SiCp''2LnCH (SiMe3) 2 (Cp'= η5-Me5C5; Cp''= η5-Me4C5; Ln= lanthanide) as precatalysts. In the case of the intramolecular processes, substrates of the structures RC⋮ ...