Answer the following question, with explanation first.
Sulkin was on Disney Channel's Pass the Plate as Gregg from the UK. He had a recurring guest role on the Disney Channel series Wizards of Waverly Place, where he played Alex's love interest Mason Greyback he reprised his role in 4 episodes of season 3 and returned to the series in its fourth season, and through to its finale. Sulkin has also landed a role in the thriller The Heavy.\n\nBased on this passage, who does gregg sulkin play in wizards of waverly place?

Alex 's love interest Mason Greyback
To answer the question, consider the following: He had a recurring guest role on the Disney Channel series Wizards of Waverly Place, where he played Alex's love interest Mason Greyback he reprised his role in 4 episodes of season 3 and returned to the series in its fourth season, and through to its finale.

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Final answer: Alex 's love interest Mason Greyback