All of a sudden Jennifer Aniston’s fiancé Justin Theroux has trotted out his good looking younger brother Sebastian, 24. The siblings were spotted in Soho. Rumors abound that either Sebastian or Ben Stiller will be Justin’s best man when he marries Jennifer. Bets are down that Jennifer and Justin will tie the knot in a small wedding in Hawaii – they both love a beachy, relaxed location. We still think Jen might opt for her FAVORITE vacation spot- Cabo.