<Tr> <Th> Significant other (s) </Th> <Td> Lexie Grey Stephanie Edwards Maggie Pierce </Td> </Tr> <Tr> <Th> Children </Th> <Td> Samuel Norbert Avery (son via April, deceased) Harriet Kepner - Avery (daughter via April) </Td> </Tr> <P> Jackson Avery, M.D. is a fictional character in the ABC prime time medical drama, Grey's Anatomy, portrayed by actor Jesse Williams . The character was created by series creator and executive producer, Shonda Rhimes . He was introduced in season six episode "Invasion" as a surgical resident formerly from Mercy West Medical Center when it merges with Seattle Grace Hospital . </P> <P> Williams initially appeared as a recurring cast member, and was later promoted to a series regular in season seven . The character's main storyline involves Jackson trying to achieve success on his own instead of riding on the coattails of his surgeon grandfather's high reputation . </P>

What season does jackson avery come into grey's anatomy