Yair Marx is an extremely wealthy man and international playboy from Israel. He is portrayed by Assaf Cohen. Yair was described by Ari Gold as being a potentially "very dangerous man who might be a prince, an arms dealer, a coke dealer, who knows." Ari nervously says that Yair "could be Mossad or Hezbollah, neither would surprise him." After unsuccessfully pitching Sylvester Stallone as Pablo Escobar's father for Medellin, Yair offers to finance the film for 60 million dollars if Vince will sleep with Yair's wife, Nika Marx.