It has starred Greta Gerwig in its ` ` How I Met Your Mother '' spinoff . The decades - old actress is known mainly for her television work . ` ` How I Met Your Mother '' will end this spring .
CBS has cast Greta Gerwig in its `` How I Met Your Mother '' spinoff . The 30-year-old actress is known mainly for her film work . `` How I Met Your Mother '' will end this spring .