She next starred in "How to Marry a Millionaire", a romantic comedy about three models plotting to marry wealthy men, co-starring Marilyn Monroe and Lauren Bacall. During production, Grable and Monroe were falsely rumored to be at odds with each other. Grable, whose career was declining, was assumed to be jealous of Monroe because she was being groomed as Fox's newest star and possibly as Grable's unofficial successor. In fact, Grable and Monroe got along famously; Grable reportedly told Monroe: "Go and get yours honey! I've had mine!" "How to Marry a Millionaire" was a box-office triumph when released, grossing an estimated $8 million.