With 50 films under her belt, Meryl Streep has had her fair share of costars ... and kissed quite a few of them too!

Ellen DeGeneres put the veteran actress to the test, asking her to identify which costars she's kissed ... by their lips only. Streep struggled to identify her male costars, but nailed one of her female ones right off the bat. She is a thespian after all ...

Watch the fun video below!



Think you can identify celebrities by their lips? Try to identify these "Real Housewives" stars just by their puckers alone!