The article reports on the fourth study in a series of four designed to test the prediction that a nativelike accent is unattainable for those who start to acquire an SL after the close of the critical period. Sentences read out by late learners, who acquired Dutch in an immersion setting, were rated for accent by native speakers of Dutch. The results from this study, in combination with those from three previous studies, suggest that, in spite of the claims of the critical period hypothesis, late learners can achieve a nativelike accent in an SL, and that a combination of input, motivational, and instructional factors may compensate for the neurological disadvantages of a late start.