<Tr> <Th> Occupation </Th> <Td> Actor </Td> </Tr> <Tr> <Th> Years active </Th> <Td> 2006--present </Td> </Tr> <P> Cody Allen Christian (born April 15, 1995) is an American actor . He is known for his recurring role as Mike Montgomery in the Freeform series Pretty Little Liars, and for his role as Theo Raeken from the fifth and sixth seasons of the MTV series Teen Wolf . </P> <P> Cody is the son of a Native American mother, who is of the Penobscot nation and grew up on a reservation in Maine . His mother also is a Breast Cancer survivor, and he has campaigned to raise money for breast cancer research . </P>

Who plays arias brother in pretty little liars