Speaking of Marc, Page Six is also saying that his "friends" are worried because "he spends most of his time partying until morning in Paris . . . it's out of control. There's always a different boy and everyone is worried he's going to pull a Halston."
That may or may not be true, but in the same article, Page Six says that Marc showed up "two hours late [to the Costume Institute Gala] with yet another nameless young man in tow." The first part doesn't make sense, Marc couldn't have been that late, since he was there early enough to make the red carpet photos, but as for the second part — could the mystery man be the guy on the far left? He's definitely not Sofia's Thomas Mars or Helena's Paul Banks.