How's this for a Grecian Formula ... Tiffany Trump and Lindsay Lohan in Mykonos.
Tiff and LiLo partied Friday night at a fundraiser to help victims of the Greek wildfires.
Turns out Donald Trump's youngest daughter and Lindsay are old buds and have actually hung out a lot over the years.
Lindsay opened a club called Beach House Mykonos earlier this year. As for Tiffany ... she's spending the summer overseas after finishing her second year at Georgetown Law School.
Another reality show ... anyone?