Jennifer Aniston-Justin Theroux Wedding: Who's Best Man? By Author Free Britney Published: Oct 01, 2013 at 7:06 PM • Updated: May 10, 2022 at 12:08 AM • Category Jennifer Aniston Reading Time: < 1 minute Jennifer Aniston’s half-brother AJ Aniston is a 24-year-old “crust punk,” who will reportedly serve as best man at her wedding.