The sweaters were a dead giveaway. (Pic via The Tulane Hullabaloo)

You and your BFF might totally feel like you're sisters, but you have nothing on Mikayla Stern-Ellis and Emily Nappi, Tulane students who met during their freshmen year roommate search.

After filling out an online questionnaire,  Stern-Ellis and Nappi realized they both had similar answers. Though they didn't end up moving in together, they stayed in touch and gradually learned they had so much more in common, including that they were both fathered by sperm donors, and in both cases, the sperm donor was Colombian.

Sources: Tulane Hullabaloo