After his enigmatic neighbor and secret love Margo (Cara Delevingne) disappears--leaving behind cryptic clues for Quentin (Nat Wolff) to decipher. The search .br After his enigmatic neighbor and secret love Margo (Cara Delevingne) disappears--leaving behind cryptic clues for Quentin (Nat Wolff) to decipher. The search .br After his enigmatic neighbor and secret love Margo (Cara Delevingne) disappears--leaving behind cryptic clues for Quentin (Nat Wolff) to decipher. The search .br Cara Delevingne, Nat Wolff and John Green participate in a Q&A with fans in London. Adapted from the bestselling novel by author John Green (The Fault in .