Who played jason dilaurentis in pretty little liars?
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Who plays Jason DiLaurentis in Season 1 of Pretty Little Liars?
Parker Bagley
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Who plays Jason DiLaurentis in Season 2-7 of Pretty Little Liars?
Drew Van Acker
List of Pretty Little Liars characters
https://en.wikipedia.org/wiki/List%20of%20Pretty%20Little%20Liars%20characters
Jason DiLaurentis (Parker Bagley, later Drew Van Acker) (seasons 1–7) is the half-brother of Alison, Spencer and Melissa. 
List of Pretty Little Liars characters
Jason is the half-brother of Alison, Spencer and Melissa on Pretty Little Liars. He is portrayed by Parker Bagley in Season 1 and Drew Van Acker in Season 2-7.