<Table> <Tr> <Th_colspan="2"> Lexie Grey </Th> </Tr> <Tr> <Td_colspan="2"> Grey's Anatomy character </Td> </Tr> <Tr> <Td_colspan="2"> The season six promotional photograph of Chyler Leigh as Dr. Lexie Grey </Td> </Tr> <Tr> <Th> First appearance </Th> <Td> "Testing 1 - 2 - 3" 3x24, May 10, 2007 (as guest star) "A Change is Gonna Come" 4x01, September 27, 2007 (as main cast) </Td> </Tr> <Tr> <Th> Last appearance </Th> <Td> "Flight" 8x24, May 17, 2012 </Td> </Tr> <Tr> <Th> Created by </Th> <Td> Shonda Rhimes </Td> </Tr> <Tr> <Th> Portrayed by </Th> <Td> Chyler Leigh </Td> </Tr> <Tr> <Th_colspan="2"> Information </Th> </Tr> <Tr> <Th> Full name </Th> <Td> Alexandra Caroline Grey </Td> </Tr> <Tr> <Th> Nickname (s) </Th> <Td> Lexie Fastball Lexipedia Three Little Grey Lex Sweet N' Low </Td> </Tr> <Tr> <Th> Occupation </Th> <Td> Surgical resident at Seattle Grace Mercy West Hospital </Td> </Tr> <Tr> <Th> Title </Th> <Td> M.D. </Td> </Tr> <Tr> <Th> Family </Th> <Td> Thatcher Grey (father) Susan Grey (mother, deceased) Meredith Grey (half - sister) Molly Thompson (sister) </Td> </Tr> <Tr> <Th> Significant other (s) </Th> <Td> Mark Sloan Alex Karev Jackson Avery </Td> </Tr> <Tr> <Th> Relatives </Th> <Td> Derek Shepherd (brother in - law, deceased) Zola Grey Shepherd (half - niece) Derek Bailey Shepherd (half - nephew) Ellis Shepherd (half - niece) Laura Thompson (niece) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Lexie Grey </Th> </Tr> <Tr> <Td_colspan="2"> Grey's Anatomy character </Td> </Tr> <Tr> <Td_colspan="2"> The season six promotional photograph of Chyler Leigh as Dr. Lexie Grey </Td> </Tr>

When does lexie and sloan get back together