For the spinoff pilot , Bays and Thomas are collaborating with `` Up All Night 's '' Emily Spivey on a similar concept , but one with a gender reversal . Greta Gerwig has cast CBS 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 2012 .
Greta Gerwig has cast CBS 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 2012 .