I would say that the most bizarre Hollywood couple of all time is Woody Allen and his wife, Soon-Yi Previn. Previously, he was married to Harlene Susan Rosen and then he was in a relationship with Mia Farrow. Farrow had adopted several children including Soon-Yi Previn. That is what makes it so bizarre. He married his girlfriend’s adopted daughter. In a sense, Soon-Yi Previn was part of Woody Allen’s family before he married her.
I don’t think they are necessarily bizarre people although I don’t know them. I do think that the way that they got together is questionable and seems bizarre based on the roles that they played prior to getting married. It seems taboo for people to marry their stepchildren.