Gregg was born in London, England, where he attended Highgate School. Gregg made his acting debut in 2002, with the mini-series Doctor Zhivago
(2002). Gregg played the lead role, Will Wagner, in the Disney Channel Original movie Avalon High
(2010), which premiered on November 12th, 2010. He also appeared as Alex Russo's werewolf boyfriend, Mason ...
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