Barry Farber was engaged to Rachel Green, before she left him at the altar. He is an orthodontist.
While Rachel and Barry were engaged, he was having an affair with Mindy Hunter, Rachel's best friend and maid of honor. After Rachel left him at the altar, he and Mindy went on the honeymoon that he and Rachel would have had in Aruba. Two years later he became engaged to Mindy, but he then cheated on her with Rachel. When Mindy found out from Rachel, the two confronted Barry, however Mindy decided that she would still marry Barry. They divorced in season six after he cheated on her with another woman. Later on, Amy uncovers her making out sessions with Barry after Rachel had gone to sleep, while they were engaged, confirming his unloyal nature. During The One That Could Have Been, Rachel is married to Barry. When she and Joey nearly make out, Joey tells Rachel she is a good wife and she shall not cheat on her husband. When she comes home that day, she finds Barry with the dog walker, which probably results in a divorce.
- In The Pilot, his last name was "Finkle", but in all other episodes it was "Farber".
- As Rachel explains to Monica why she abandoned her wedding, she says that just before running away, she realized "how much Barry looks like Mr. Potato Head."